| 334519 |
Theodolites, surveying, manufacturing |
| 334519 |
Thermocouples (except industrial process, aircraft type, glass vacuum) manufacturing |
| 334519 |
Thermometer, liquid-in-glass and bimetal types (except medical), manufacturing |
| 334519 |
Thickness gauging instruments, ultrasonic, manufacturing |
| 334519 |
Thrust power indicators, aircraft engine, manufacturing |
| 334519 |
Time clocks and time recording devices manufacturing |
| 334519 |
Time locks manufacturing |
| 334519 |
Time stamps containing clock mechanisms manufacturing |
| 334519 |
Timers for industrial use, clockwork mechanism, manufacturing |
| 334519 |
Timing mechanisms, clockwork, manufacturing |