| 334515 |
Radiofrequency oscillators manufacturing |
| 334515 |
Recorders, oscillographic, manufacturing |
| 334515 |
Relays (except electrical, electronic), instrument, manufacturing |
| 334515 |
Resistance measuring equipment manufacturing |
| 334515 |
Semiconductor test equipment manufacturing |
| 334515 |
Shunts, instrument, manufacturing |
| 334515 |
Signal generators and averagers manufacturing |
| 334515 |
Spark plug testing instruments, electric, manufacturing |
| 334515 |
Spectrum analyzers manufacturing |
| 334515 |
Standards and calibration equipment for electrical measuring manufacturing |