EATON EN54-23 ഫയർ അലാറം ഉപകരണങ്ങളുടെ നിർദ്ദേശ മാനുവൽ
EATON EN54-23 Fire Alarm Devices Technical Data EN54-23 Fire alarm devices visual alarm device for use in & around buildings Drilling diameter must be adjusted to the diameter of the cable glands. Cable glands must be compatible with declared cable…