| 334419 |
Transducers (except pressure) manufacturing |
| 334419 |
Traveling wave tubes manufacturing |
| 334419 |
Tubes, cathode ray, manufacturing |
| 334419 |
Tubes, electron, manufacturing |
| 334419 |
Tubes, electronic, manufacturing |
| 334419 |
Tubes, klystron, manufacturing |
| 334419 |
Vacuum tubes manufacturing |
| 334510 |
Arc lamp units, electrotherapeutic (except infrared, ultraviolet), manufacturing |
| 334510 |
Audiological equipment, electromedical, manufacturing |
| 334510 |
Automated blood and body fluid analyzers (except laboratory) manufacturing |