368 / | HD | HOROLOGY: TIME MEASURING SYSTEMS OR DEVICES |
46 | PLURAL TIMEPIECE SYSTEM OR SYSTEM DEVICE (E.G., PRIMARY OR SECONDARY CLOCKS) {5} | |
47 | DF | .~> With wireless synchronization |
48 | DF | .~> With auxiliary power source |
49 | DF | .~> With significant winding or setting means {2} |
52 | DF | .~> Primary with direct synchronization or drive {6} |
59 | DF | .~> Secondary {1} |