368 / | HD | HOROLOGY: TIME MEASURING SYSTEMS OR DEVICES |
89 | DF | TIME INTERVAL {6} |
107 | DF | .~ Electrical or electromechanical {3} |
113 | .~.~ Stop time type {5} | |
114 | DF | .~.~.~> With physically changeable element |
115 | DF | .~.~.~> Including cathode-ray tube oscilloscope {2} |
118 | DF | .~.~.~> Including time base oscillator {1} |
120 | DF | .~.~.~> Including delay means |
121 | DF | .~.~.~> Including time indicating means actuated by voltage or electrical charge {2} |