can anybody tell me what lt;differential lockgt; in 4*4 cars means!? and how it works?! and how to know if ur cars is supplied with that?! and is it a good thing or not!!!!!!!!?thanks in advance
I don't think it has a name other than a lock.
They pay attention to the flashing lights,the sight of flames, the smell of smoke and the anxious hearing people and they leave the building.As for the alarm clocks they use vibrating timers placed under the pillow or timers which cause the bedroom lights to flash on and off repeatedly when they need to wake up.
Fire alarms in public buildings are required to have flashing red lights on them. Not sure about alarm clocks.
In my building as well as several other buildings I've been in, the fire alarm flashes like a strobe light. The same thing with alarm clocks, my sister who is deaf has an alarm clock that flashes and has a system of lighting in her home that responds to someone ringing the doorbell so she knows when someone is there.
It's not that much of an issue. Obviously they would see many other people leaving the building in a hurry, that would be pretty big tip off that something was going on, also they can smell the smoke from the fire, and as others have pointed out, most buildings have visual alarms as well.
