| Traffic and Transit Signal Systems |
Alarm, Signal and Security Detection Systems |
|
63 |
6310 |
| Shipboard Alarm and Signal Systems |
Alarm, Signal and Security Detection Systems |
|
63 |
6320 |
| Railroad Signal and Warning Devices |
Alarm, Signal and Security Detection Systems |
Includes Railroad Gates; Flasher Lights; Bloc... |
63 |
6330 |
| Aircraft Alarm and Signal Systems |
Alarm, Signal and Security Detection Systems |
Includes Oxygen Pressure Signals and Warning ... |
63 |
6340 |
| Miscellaneous Alarm, Signal, and Security Detection Systems |
Alarm, Signal and Security Detection Systems |
Includes Anti-intrusion Alarm Systems; Foghor... |
63 |
6350 |
