Belmont EDS Over-The-Patient Delivery Guide d'installation

WARNING: PLEASE TAKE TIME OUT TO READ THROUGH THE FEATURES AND FAMILIARIZE YOUR SELF WITH THE

UNIT. THIS UNIT SHOULD BE ASSEMBLED ONLY BY A QUALIFIED DENTAL EQUIPMENT TECHNICIAN.

For questions and general information, please contact us at:

Belmont Equipment

101 Belmont Drive

SOMERSET, NJ 08873

Watts: 800-223-1192 or Fax: 732-356-1035 060911

Model Numbers:

EDS-0500 and EDS-0510

Owner’s Manual

and Installation

Instructions

2

INDICATION FOR USE STATEMENT

Device Name: Belmont Series Dental Units

Indications For Use:

Belmont Series Delivery Units are intended to be used by Dentists, Hygienists, and Dental

Assistants, or other licensed physician, or practitioner to supply power and utilities to, and

serve as a base for, dental instruments and tools.

3

The serial numbers on your dental unit are found (1) under the delivery head and

(2) inside the side mounted vacuum box.

Register them here for future use. __________________________

Warranty

Belmont Equipment is warranted from the manufacturer to be free from defective material and

workmanship under normal use and service, for a period of two (2) years from date of shipment

to the Buyer, except that any part or parts that are replaced under this Warranty within ninety

(90) days of the completion of the two (2) year period shall be warranted to be free from

defective material and workmanship for a period of ninety (90) days from date of shipment of

said parts to Buyer. Belmont will repair or replace any defective part under this Warranty,

provided the part is returned to our factory with prepaid postage, delivery or freight charges. In

the event Warranty service must be performed to correct any defect, only Belmont and/or one of

its authorized dealers shall provide same upon mutually agreeable arrangements made in

advance.

Except as otherwise provided herein, the is NO WARRANTY, representation or condition of ANY

KIND, express or implied (including NO WARRANTY OF MERCHANTABILITY OR FITNESS) and

none shall be implied by law. THE EXPRESS WARRANTY AND THE REMEDIES CONTAINED

HEREIN (1) ARE MADE SOLELY TO THE FIRST PURCHASER FOR BENEFICIAL USE (THE BUYER),

(2) ARE THE SOLE WARRANTIES AND REMEDIES, (3) ARE IN LIEU OF ALL OTHER WARRANTIES,

GUARANTEES, AGREEMENTS OR OTHER LIABILITIES, WHETHER EXPRESSED OR IMPLIED, AND

ALL OTHER REMEDIES FOR BREACH OF WARRANTY OR ANY OTHER LIABILITY OF BELMONT. IN

NO EVENT SHALL BELMONT BE LIABLE FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES.

No person, agent, distributor or dealer is authorized to change, modify or extend the terms of the

Warranty in any manner, whatsoever.

This Warranty is void when failure or defect is caused by conditions beyond the manufacturer’s

control, such as damage resulting from mishandling, neglect, misuse, improper maintenance,

accident or alteration or repair by anyone other than Belmont or an authorized Belmont dealer.

Labor required to repair, replace or retrofit is not included during the warranty period by the

manufacturer.

Please address any warranty or non-warranty service requests to your local dealer.

4

TABLE OF CONTENTS

Indications for Use 2

Warranty Policy 3

Installation Procedures

Tools Required for Assembly 4

Symbols 5

Assembly Instructions 6-7

Utility Center 8

Cuspidor Assembly 9

Assistants Package 10

Flex arm Parallelism adjustment 10

Control Head 11

Operation and Control

Delivery Head Operations and Controls 11

Tubing Color Guide 11

Troubleshooting Guide

Delivery System Troubleshooting 12

Cuspidor System 13 9 9

Foot Control Troubleshooting 14-15

Foot Control Parts Breakdown 15

Syringe Installation / Parts Breakdown 16

Syringe Troubleshooting Guide 17

Diagrams & Schematics

HVE/SE Care Maintenance and Sterilization 17

Delivery Head Control Schematic 18

Cuspidor schematic 18

Contamination Control System 19

Delivery Dimensions and Specifications 19

Tools required for Assembly

Phillips screwdriver #2

Snap Ring pliers

Box knife

9/16” Box end wrench

5/32” Allen wrench

1/8” Allen wrench

3/32” Allen wrench

Magnetic Bubble Levels

5

Symbol Definitions

DANGER

A DANGER is used for an imminently

hazardous operating procedure, practice or

condition which, if not correctly followed, can

result in loss of life or serious personal injury.

WARNING

A WARNING is used for a potentially

hazardous operating procedure, practice or

condition which, if not correctly followed, can

result in loss of life or serious personal

injury.

CAUTION

A CAUTION is used for a potentially

hazardous operating procedure,

practice or condition which, if not correctly

followed, could result in minor or moderate

injury. It may also be used to alert against

unsafe practices.

EQUIPMENT ALERT

An EQUIPMENT ALERT is used for

an imminently or potentially

hazardous operating procedure, practice or

condition which, if not correctly followed, will

or could result in serious, moderate or minor

damage to unit.

High Voltage, Haute tension

Ground, Mise à la Terre

Fuse Rating Specs, Spécifications du fusible

Shipping Orientation, Orientation du colis

pour l’expédition

Fragile, Fragile

Storage Range, Plage ou To

d’emmagasinage

Keep Dry, Garder au Sec

Exercise Mode, Mode d’utilisation

Hot Surface, Surface chaude

Type B Applied Part, Dactylographiez la

partie appliquée par B

Définitions des symboles

DANGER

DANGER est utilisé dans le cas d’une

procédure hasardeuse éminente, une

condition d’opération ou une pratique qui, si

elle n’est pas respectée, peut résulter en la

perte de vie humaine ou engendrer des

blessures corporelles graves.

AVERTISSEMENT

AVERTISSEMENT est utilisé pour

signaler une procédure

potentiellement dangereuse, une condition

d’opération ou une pratique qui, si elle n’est

pas respectée, peut résulter en la perte de

vie humaine ou engendrer des blessures

corporelles graves.

PRUDENCE

PRUDENCE est utilisé pour signaler

une procédure potentiellement

dangereuse, une condition d’opération ou

une pratique qui, si elle n’est pas respectée,

peut provoquer des blessures corporelles

mineures. Peut être utilisé également pour

signaler des pratiques hors normes ou non

sécuritaires.

ÉQUIPEMENT ALERTE

ÉQUIPEMENT ALERTE est utilisé

pour signaler une procédure

hasardeuse éminente ou potentiellement

dangereuse, une condition d’opération ou

une pratique qui, si elle n’est pas respectée,

va ou pourrait causer des dommages

sérieux, modérés ou mineurs à l’appareil

(équipement).

Self-contained Water, Source d’eau

Indépendante

Municipal Water, Eau municipale

Cup Fill, Distributeur d’eau pour gobelet

Bowl Flush, Source d’eau temporisée pour

petit lavabo

Drive Air, Source d’air

Coolant Air Flow Control, Contrôle de flux

d’air pour refroidissement

6

Water Flow Control, Contrôle de flux d’eau

Assembly Instructions

EQUIPMENT ALERT

It is very important to completely remove the clamp

from the vacuum box assembly before inserting poles.

Do not slide the poles in their slots.

Failure to remove clamp will result in scratching of the powder-

coat.

1) Lay the cuspidor box on its side on the plastic bag it

is packed in or on its box.

2) Remove the CV canister lid and push the plastic top

cover housing up over the lip of the CV canister. If

0500 Cuspidor, also push Cuspidor up from the top

cover. Remove the side cover panel (4 screws).

3) Remove the clamp by removing the two bolts holding

the clamp as shown.

4) Insert the smaller pole (16”) into the slot on the left.

It should be even with the box at the bottom.

5) Insert the 45” light pole in the center slot with

approximately 3 inches protruding from the bottom

of the box.

6) Replace the clamp over the poles, tighten the center

bolt first and then the bolt on the right. Tighten the

set screws around the poles.

7) Insert the vacuum box assembly onto the chair

adapter and level using the 6 set screws on the

adaptor collar.

7

Diagram-C

8

8) Install the two round trim rings over the tops of the poles. Insert the tubing bundle and Flex

arm into the top of the smaller pole (16”) and out the side slot near its base. Cut the plastic

and paper wraps that secure the flex arm. Connect the tubing from the flex arm to the

matching color of tubing coming from the 2”umbilical tube located in the cuspidor/assistant

box. (See Diagram C) Note: when preparing to twist the luers together turn them counter

clockwise or in the opposite direction before twisting them together to avoid the spring

reaction of the tubes causing them to disconnect.

9) On the unattached end of the umbilical, slide the large spiral flex tubing into the appropriate

slot in the junction box. Connect all the tubing according to the tubing diagram.

(See Diagram D) Note: when preparing to twist the luers together turn them counter

clockwise or in the opposite direction before twisting them together to avoid the spring

reaction of the tubes causing them to disconnect.

10) Install the foot control tubing and make the necessary connections according to the diagram.

(See Diagram D/1)

11) If a contoured cuspidor (EDS-0500) is part of this delivery system, spread grease around the

inside of the cuspidor bowl socket. Press fit the Cup fill and Bowl flush spouts into their

respective holes in the cuspidor bowl. Attach the 1/4” tube to the Bowl flush barb, and the

1/8” tube to the Cup fill barb. Press the cuspidor bowl snuggly into the gray bowl socket on

the cuspidor support assembly, taking care not to roll the O-rings out of their slots.

12) After securing bowl in cuspidor bowl socket: use a #2 phillips screw driver (with at least a 4”

shank) and locate the 2 holes under the cuspidor bowl housing. Insert screw driver to tighten

the 10-32 well nut screws. (see diagram on page 9) Failure to tighten screws will result in an

unsecured cuspidor bowl which may result in leaking.

13) Reinstall the solids collector lid. Install the 2 instrument holders onto the vacuum

instrumentation bracket, tighten the 10-32 set screws with a 3/32” Allen wrench. Hang the

HVE and saliva ejector into the egg holders. Reinstall the cuspidor box side panel using the 4

screws that were removed earlier.

NOTE: Cuspidor Bowl Must be leveled in order to drain properly. Check using a bubble level.

CAUTION

The flex arm is wrapped under spring pressure. Personal injury can occur if

care is not used when cutting the wrap holding it in place.

9

Utility Center Tubing Diagram

C=SWITCHED, FILTERED, REGULATED

B=SWITCHED,FILTERED, UNREGULATED

A= UNSWITCHED, UNFILTERED, UNREGULATED

UTILITY CENTER PLUMBING DIAGRAM

RIGHT SIDE VIEW

LEFT SIDE VIEW

UTILITY CENTER LAYOUT DIAGRAM

WATER

AIR

WATER

D

(D/1)

10

10-32

Well Nuts

(Tighten from

under housing,

see #12, page 7)

11

14) If this is an assistant’s package (EDS-0510), push the plastic top cover housing back down

over the lip of the solids collector canister. Reinstall the solids collector lid. Remove the 2

socket head cap screws from the post mount clamp bracket, separate the 2 sections of the

bracket. Locate the bracket on the 16” post at an approximate 90-degree angle to the

assistant’s box. Tighten the 2 socket screws on the bracket. Install the 2 instrument holders

onto the assistant’s arm, fasten the 10-32 set screw with a 3/32” Allen wrench. Hang the

HVE and saliva ejector into their holders. Reinstall the assistant’s box side panel using the 4

screws that were removed earlier.

You have completed the Belmont ECO-Sys Delivery installation. Thank you for purchasing one

of the most reliable delivery systems made today.

CAMBER AND TENSION ADJUSTMENT

The delivery head on the flexible arm should travel in a

parallel plane to the floor, if not, the camber may need to

be adjusted.

Initially, two checkouts should be performed (adjustment of

the flexible arm may not be the problem).

Check chair post for vertical alignment (plumb). If not

level, adjust as necessary.

Check the delivery system head for level. Adjust if

necessary using shims (4 set screws in control mount)

Check that arm does not rise or fall on its own from its

set position. Adjust tension as necessary.

To adjust travel of the flexible arm in a parallel plane:

1) Remove plastic end cap from the arm.

2) Turn vertical adjustment screw with a 1/8” allen

wrench clockwise to lower or counter-clockwise to

raise until delivery system travels in a plane parallel to

the floor.

3) Adjust the tension by turning the adjustment screw

shown in View A with a ½” socket wrench with

extension. Clockwise to increase tension, counter-

clockwise to decrease tension

4) Replace plastic end cap. Delivery system head may

need to be re-leveled (see leveling instruction above).

12

A) Master Air & Water On/Off toggle

Opens and closes the Air/Water valves in the Utility Center Box. Supplies Air and Water to

complete delivery system. (MUST BE SHUT OFF NIGHTLY.)

B) Water coolant flow control knob

Adjust the flow of water coolant to handpieces. Counter-clockwise increases flow. Clockwise

decreases flow or water off for low-speeds.

C) Handpiece tubing flush toggle

Remove handpieces from holders and activate the switch to flush Handpieces.

D) Drive-Air Pressure control knob

Adjusts the drive air pressure to the Handpiece selector. Turn clockwise to decrease pressure, and

counter- Clockwise to increase.

E) Water On/Off toggle

F) Arm Brake

Delivery Head Operation and Controls

Tubing Color Guide

1/4” Black-------------Drive Air in

1/8” Red --------------Master Air in

1/8” Yellow-----------Return Air out

1/8” Pink-------------- Bowl Flush

1/8” orange----------- Cup Fill

1/8” Blue------------Water In

1/8” Brown----------Syringe Air

1/8” Green-----------Wet/Dry

1/8” Clear------------Air Brake release

C

B

D

E

F

A

13

Troubleshooting Guide

Delivery System

Symptom

Possible cause

Corrective action

Air bubbles present in

syringe or water coolant

flow

Cross leakage through the diaphragm in the

utility center filter-regulator.

Replace diaphragm

Water in syringe air or in

handpiece drive air.

Cross leakage through the diaphragm in the

utility center filter-regulator.

Replace diaphragm

Water in supply line.

Close manual air valve in utility center

and remove the filter/regulator

assembly. Open manual air valve and

check for moisture in the air supply. If

water is present, service or install

compressed air dryer.

Water drips continuously

from handpiece when

foot control is not

depressed.

Non-retracting Water Relay Valve faulty.

Check using another handpiece. If

symptoms are the same check water

relay valve.

Partially clogged handpiece water port.

Check using another handpiece.

Handpiece runs while

still in the auto-holder.

Pilot valve in the rear of autoholder is out of

adjustment.

Turn master switch OFF. Loosen

setscrew at bottom of auto-holder

assembly, and adjust pilot valve in

slightly. Tighten setscrew.

Handpiece is in the wrong holder.

Assure that handpiece hoses are not

crossed.

Inadequate air flow to

unit.

Clogged filter element in filter-regulator

assembly.

Replace filter element

Inadequate air from foot control.

See Foot Control Troubleshooting

Guide.

Pinched supply tubing.

Check supply tubing in selector head,

utility center and in flex arm.

Water in syringe air only.

Water in air supply line.

Close manual air valve in utility center

and remove filter/regulator assembly.

Open manual air valve and check for

moisture in the air supply. If moisture

is present, service or install

compressed air dryer.

Syringe tip improperly installed.

See three-way syringe Troubleshooting

Guide.

Gauge does not read

handpiece air pressure.

Tubing at rear of gauge is pinched against

chassis.

Push the gauge back towards the rear

of delivery head.

Bracket around gauge is too tight and

pinches casing.

Slightly loosen screw(s) holding

bracket and test.

14

Cuspidor Troubleshooting

Symptom

Possible cause

Corrective action

Water does not

flow from cup fill

spout

Check that the Manual water shut-of valve is

turned on. (J-Box)

Turn valve Counter Clockwise to open valve

MSO Water Filter is clogged

Unscrew the water filter body and check for

clogged filter. Replace as needed

Water regulator is not operating properly

Unscrew the lock nuts and turn the thumbscrew

in and out. Clockwise increases pressure

counter clockwise decrease pressure. If this

doesn’t work replace regulator. Regulator is

factory set at 80 psi.

¼” blue tube is pinched off, or stretched too

tightly. Disconnect tube from the cuspidor

box and check water flow.

Replace or repair as needed.

Cuspidor shut-off valve is not working

properly

Disconnect the 1/8” Orange tube from the shut-

off valve inside the cuspidor and check the

signal from the delivery system remote toggle,

and or the Assistants Box toggle for proper

signal. Replace valve as needed.

Water does not

flow from Timed

Bowl Rinse Spout

Refer to possible causes for cup fill spout

Refer to possible solutions for cup fill spout

Cuspidor doesn’t

drain properly

Cuspidor bowl is not leveled properly

Using a bubble level, place it perpendicular to

the chair. Cuspidor Bowl should be tipped 3

degrees towards the toe of the chair. Use 1/8”

Allen wrench on cuspidor leveling screw. (Note

water flows down hill )

Cuspidor Drain tubing is pinched

Locate problem and fix or replace as needed. If

problem isn’t the tubing and there is not a

visible reason that the cuspidor should not

drain. You may need to install a vacuum drain

kit.

15

Foot Control Troubleshooting

Symptom

Possibl

e

Cause

Test procedure

Corrective Action

If test is

Normal

If test is

Abnormal

Audible

leakage while

the Foot

Control is not

being used.

Loose

mounting

screws.

Turn Foot Control face

down and tighten the two

Phillips-head screws at

the center of the

baseplate.

If the leakage stops, no

further action is

required.

If leakage does not

stop, proceed with the

next step.

Loose

tubing

connection.

Note “WARNING” in the

DESCIPTION heading.

Remove the Foot Control

cover and use a soap

solution, if necessary, to

locate the source of the

leakage.

If the air is leaking

around a barb

connection, tighten the

barb and re-test the

valve.

If the air is leaking

from the exhaust vent

or around the bottom

of the valve body,

proceed with the next

step.

Defective

O-Rings or

sealing

surface.

Turn the unit OFF and

bleed the air pressure,

then disassemble the

Foot Control. Inspect the

O-Ring and sealing

surfaces for defects or

debris.

If no defects are noted,

carefully clean and

lubricate the parts.

Reassemble and test

the valve.

Replace any defective

parts. Carefully clean

and lubricate the parts.

Reassemble and test

the valve.

Inadequate air

flow from the

Foot Control.

Pinched

tubing

going to or

from the

Foot

Control.

Inspect the Foot Control

for crimps or restrictions.

If no problem is found,

proceed with the next

step.

If tubing is crimped.

Install a new tube.

Assemble and test the

unit.

Obstruction

at the inlet

or outlet.

Note “WARNING” in the

DESCRIPTION heading

With the cover removed,

depress the piston and

check for adequate

airflow.

If no defects are noted,

carefully clean and

lubricate the parts.

Reassemble and test

the valve.

Replace any defective

parts. Carefully clean

and lubricate all parts.

Reassemble and test

the valve.

Foot control is

sluggish.

Stem may

be Sticking.

Note “WARNING” in the

DESCRIPTION heading.

Remove the valve body

from the base. Remove

and inspect the O-Rings

and spacers for debris or

defective parts.

If it works easily and

smoothly, check for a

weak or improperly

installed spring.

If there is any sticking

or binding, remove the

stem, spacers, and O-

Rings. Replace any

defective parts.

Carefully clean and

lubricate all parts.

Reassemble and test

the valve.

16

17

Foot Control Troubleshooting (continued)

EQUIPMENT ALERT

Before removing the foot control

cover, turn the air supply OFF

and bleed all pressure from the system.

Failure to do so can result in the stem

assembly being ejected from the foot

control valve.

Foot Control Parts Breakdown

Description

The Foot Control is actuated by foot pressure on the

cover, which depresses the stem assembly in the valve

bore. This moves the fluted surface of the stem below

the inlet O-Ring seal, allowing air to flow to the outlet.

When foot pressure is released, the stem returns,

sealing the inlet at the O-Ring. Any pressure from the

outlet side of the valve is then exhausted as the fluted

surfaces move above the outlet O-Ring seal.

18

Installation and removal of syringe tip

Install: Depress collar (3) and insert base of tip (1) into the hexagonal hole on

adapter (2). Gently push in on tip until it is seated in syringe head. Release

collar (3) to lock the tip in position Always make sure the syringe tip is fully

inserted and locked. Pull lightly on the syringe tip to test before using.

Remove: Depress collar (3): gently pull tip(1) from adapter (2).

Installation of tubing

Turn off air and water supply. Connect syringe air and water tubing to air and

water ports on dental unit or syringe manifold.

Three-way syringe Installation

Three-way syringe Troubleshooting

EQUIPMENT ALERT

Never install a three-way syringe in a system without a provision for

turning off air and water supplies. When the operatory is unattended or

when maintenance is being performed, both the air and water supplies should

be turned off.

A) Momentary water spray when air button is pressed

1) Check that tip is properly seated and locked by pulling lightly on

syringe tip. If not seated and locked see the instructions for

Installation and Removal of Syringe Tip. If not seated and locked

see the instructions for Installation and Removal of Syringe Tip. If

tip was seated and locked, O-rings (4&6) need to be replaced- go to

following steps.

2) Remove tip (1) from adapter (2).

3) Important note: while removing adapter (2) and collar (3), be careful

to position collar (3) so ball bearings housed inside it do not fall out.

Insert 5/32” Allen wrench into the hexagonal hole on adapter (2),

and turn wrench to remove adapter. Remove O-rings (4&6).

4) Apply a light coating of silicone lubricant to new O-rings (4&6).

Install O-rings on adapter, and carefully reinstall spring (5), collar (3)

and adapter (2) on syringe head. Use Allen wrench to firmly tighten

adapter.

B) Air or Water leakage around buttons

1) Use paper clip to push retaining pin (14) completely out of syringe

body. Remove the problem button assembly from syringe.

2) Use needle nose pliers, or forceps, to remove retaining ring (13)

from button assembly. Remove brass spool (9) from button stem

(10).

3) Note position of O-ring (12) on brass spool, and O-ring (11) on button

stem. Use a sharp instrument to cut both O-rings. Remove O-ring

from the stem assembly.

4) Apply a light coating of silicone lubricant to all new O-rings. Install

O-ring (12) on brass spool, and O-ring (11) on the button stem in

positions noted in step 3. Insert button stem through brass spool.

O-ring (8) is positioned between the bottom of brass spool and

retaining ring (13).

5) Note the position of spring (7), and insert spring into syringe head.

Insert button assembly on top of spring, and secure it in the syringe

head with retaining pin (14).

6) Turn on air and water supply to system.

19

HVE/SE Care Maintenance and Sterilization

After Each Patient

Immerse the suction tip in clean water. Open and close the valve 3

times. This will decrease the accumulation of particles in the spool

valve area, which can interfere with the valves operation.

Daily Care

Immerse the suction tip in clean water. Open and close the valve 3

times. Using a rigid brush approximately 3/8” in diameter brush the

internal surfaces.

As Needed

When the bail lever becomes difficult or is sticking, you will need to

remove the Spool Valve to clean and lubricate the internal

components.

To remove the spool valve (refer to figures A and B):

1) Gently pry the bail lever out from the valve on one side

until it is free from the recesses in the spool.

2) Push the spool out of the valve.

Thoroughly clean the surfaces, and inspect the O-rings for wear or

damage. Replace O-rings that have nicks, cuts, flat spots or other

signs of damage.

Surface Disinfecting

Do not use Sodium Hypochlorite or any bleaching agents to clean

these instruments. They will cause permanent damage.

Sterilization

Autoclavable vacuum valves should be steam autoclaved between

patients. The following protocol should be followed:

HVE – steam autoclave at 134ºC (273 ºF), 6 minutes holding time

SE – steam autoclave at 134ºC (273 ºF), 6 minutes holding time

Air/Water Syringe - steam autoclave at 134ºC (273 ºF), 4 minutes

holding time

Regardless of the process used, temperatures should never exceed

280 degrees Fahrenheit or 138 degrees Celsius.

Do not allow the instrument to come into contact with the walls of the

sterilizer. Avoid placing the instrument in close proximity to the

sterilizer heating element.

Each handheld device with air and water lines should be discharged

for 20-30 seconds between each patient to reduce the chance of

cross-contamination as a result of potential bio-burden retraction.

Specifications

Minimum air, water and vacuum service requirements for proper unit

operation:

Air: 2.50 cfm (70.80 1/min) at 80 psi (551 kPa).

Water: 1.50 gpm (5.68 1/min) at 40 psi (276 kPa).

Vacuum: 12 cfm (339.84 1/min) at 8 inches of mercury (27 kPa).

Specifications are subject to change without notice

HVE valve

Fig A

SE valve

Fig B

20

Eco-Sys Control Head and Cuspidor Schematics

La page charge ...

Belmont EDS Over-The-Patient Delivery Guide d'installation

Belmont EDS Over-The-Patient Delivery Guide d'installation

dans d''autres langues

Documents connexes

Autres documents