| Naics index | Naics index description |
|---|---|
| 334515 | Standing wave ratio measuring equipment manufacturing |
| 334515 | Stroboscopes manufacturing |
| 334515 | Sweep generators manufacturing |
| 334515 | Sweep oscillators manufacturing |
| 334515 | Synchroscopes manufacturing |
| 334515 | Tachometer generators manufacturing |
| 334515 | Test equipment for electronic and electrical circuits and equipment manufacturing |
| 334515 | Test sets, ignition harness, manufacturing |
| 334515 | Voltmeters manufacturing |
| 334515 | Watt-hour and demand meters, combined, manufacturing |