| Naics index | Naics index description |
|---|---|
| 334519 | Levels and tapes, surveying, manufacturing |
| 334519 | Lie detectors manufacturing |
| 334519 | Magnetometers manufacturing |
| 334519 | Mechanisms, clockwork operated device, manufacturing |
| 334519 | Metal detectors manufacturing |
| 334519 | Meteorologic tracking systems manufacturing |
| 334519 | Meteorological instruments manufacturing |
| 334519 | Modules for clocks and watches manufacturing |
| 334519 | Movements, watch or clock, manufacturing |
| 334519 | Nephoscopes manufacturing |