340 / | HD | COMMUNICATIONS: ELECTRICAL |
500 | DF | CONDITION RESPONSIVE INDICATING SYSTEM {6} |
540 | DF | .~ Specific condition {18} |
603 | DF | .~.~ Fluent material {7} |
612 | DF | .~.~.~ Material level {6} |
618 | DF | .~.~.~.~ Liquid {5} |
623 | .~.~.~.~.~ Float sensor {2} | |
624 | DF | .~.~.~.~.~.~> Vertically reciprocable |
625 | DF | .~.~.~.~.~.~> Pivoted arm |