Alternatively, heat-sensitive components can be built into the rigging to automatically close this curtain in case of fire and finally it may be released electronically by a building's fire control system if any alarm box is operated.
Heat-sensitive components can be built into the rigging. This was alternatively. This was to automatically close this curtain in case of fire. Alternatively it may be released electronically by a building's fire control system. This was finally. Any alarm box is operated.