Potentially Explosive Environments - Nokia 1680 Classic Manual Del Usuario

wireless equipment is improperly installed and the air bag inflates,
serious injury could result.
Using your device while flying in aircraft is prohibited. Switch off
your device before boarding an aircraft. The use of wireless
teledevices in an aircraft may be dangerous to the operation of the
aircraft, disrupt the wireless telephone network, and may be illegal.
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Potentially explosive environments

Switch off your device when in any area with a potentially explosive
atmosphere, and obey all signs and instructions. Potentially
explosive atmospheres include areas where you would normally be
advised to turn off your vehicle engine. Sparks in such areas could
cause an explosion or fire resulting in bodily injury or even death.
Switch off the device at refueling points such as near gas pumps at
service stations. Observe restrictions on the use of radio equipment
in fuel depots, storage, and distribution areas; chemical plants; or
where blasting operations are in progress. Areas with a potentially
explosive atmosphere are often, but not always, clearly marked. They
include below deck on boats, chemical transfer or storage facilities
and areas where the air contains chemicals or particles such as
grain, dust, or metal powders. You should check with the
manufacturers of vehicles using liquefied petroleum gas (such as
propane or butane) to determine if this device can be safely used in
their vicinity.
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