| 334513 |
Boiler controls, industrial, power, and marine-type, manufacturing |
| 334513 |
Buoyancy instruments, industrial process-type, manufacturing |
| 334513 |
Chromatographs, industrial process-type, manufacturing |
| 334513 |
Combustion control instruments (except commercial, household furnace-type) manufacturing |
| 334513 |
Controllers for process variables (e.g., electric, electronic, mechanical, pneumatic operation) manufacturing |
| 334513 |
Coulometric analyzers, industrial process-type, manufacturing |
| 334513 |
Data loggers, industrial process-type, manufacturing |
| 334513 |
Density and specific gravity instruments, industrial process-type, manufacturing |
| 334513 |
Differential pressure instruments, industrial process-type, manufacturing |
| 334513 |
Digital displays of process variables manufacturing |