| 334516 |
Polarographic equipment manufacturing |
| 334516 |
Protein analyzers, laboratory-type, manufacturing |
| 334516 |
Redox (i.e., oxidation-reduction potential) instruments manufacturing |
| 334516 |
Refractometers, laboratory-type, manufacturing |
| 334516 |
Resonance instruments (i.e., laboratory-type) manufacturing |
| 334516 |
Sample analysis instruments (except medical) manufacturing |
| 334516 |
Scanning tunneling microscopes manufacturing |
| 334516 |
Specific ion measuring instruments, laboratory-type, manufacturing |
| 334516 |
Spectrofluorometers manufacturing |
| 334516 |
Spectrographs manufacturing |