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- Underwater Sound Equipment Page 4
Helle Engineering Inc
Category: Underwater Sound Equipment United States company- Guided Missile Components (2)
- Marine Lifesaving And Diving Equipment (1)
- Packing And Gasket Materials (1)
- Knobs And Pointers (3)
- Telephone And Telegraph Equipment (1)
- Other Cryptologic Equipment And Components (2)
- Except Airborne Intercommunication And Public Address Systems (3)
- Underwater Sound Equipment (7)
- Miscellaneous Communication Equipment (2)
- Resistors (3)
- Switches (12)
- Electrical Connectors (5)
- Relays And Solenoids (1)
- Coils And Transformers (6)
- Microphones And Speakers Handsets Headsets (6)
- Associated Hardware Cards Boards Electrical And Electronic Assemblies (11)
- Miscellaneous Electrical And Electronic Components (1)
- Nonrotating Electrical Converters (2)
- Nonrechargeable Batteries (4)
- Rechargeable Batteries (2)
- Indoor And Outdoor Electric Lighting Fixtures (2)
- Physical Properties Testing And Inspection (1)