340 / | HD | COMMUNICATIONS: ELECTRICAL |
500 | DF | CONDITION RESPONSIVE INDICATING SYSTEM {6} |
693.5 | .~ Specified housing {3} | |
693.6 | DF | .~.~> Configured to promote sensing capability (e.g., smoke detector) {1} |
693.8 | DF | .~.~> Simulation |
693.9 | DF | .~.~> Having specified mounting structure {2} |