engineers are checking fire extinguishers,system,fire alarm controller, fire notifier, anti fire

alarm alert anti are checking connection construction control controller danger emergency engineer engineers equipment event extinguish extinguisher extinguishers fighting fire firefighter firesystem gauge hazard holding house hydr hydrant industrial industry measurement notifier office panel person pipeline precaution pressure prevent prevention professional protection pump ready red safety security service smoke sprinkler system systemfire technology valve wall warning watercourse