(1) the establishment of two or more layers or to install fire alarm systems, utter types, employees working inside the building heard a loud level through sound by no less than one hundred DB (a).
(2) devices that make sound fire alarms. Yu must be obvious in their access to the easy or fire escape routes. You must install all the floors, and the distance from the point where employees work less than thirty meters
.(3) a fire signal must have a sound that is different from that used in the establishment in General, and do not use the voice in other cases not relevant.
การแปล กรุณารอสักครู่..