| 334515 |
Electricity and electrical signal measuring instruments manufacturing |
| 334515 |
Electricity and electrical signal testing equipment manufacturing |
| 334515 |
Electron tube test equipment manufacturing |
| 334515 |
Electronic test equipment for testing electrical characteristics manufacturing |
| 334515 |
Energy measuring equipment, electrical, manufacturing |
| 334515 |
Field strength and intensity measuring equipment, electrical, manufacturing |
| 334515 |
Frequency meters (e.g., electrical, electronic, mechanical) manufacturing |
| 334515 |
Frequency synthesizers manufacturing |
| 334515 |
Function generators manufacturing |
| 334515 |
Galvanometers (except geophysical) manufacturing |