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- Tools & Equipment for Science & Technology 6
- Electrical & Magnetic T&E 4
- Electrical & Magnetic Measurement Devices 3
- Instrument, Electrical 3
- Telecommunication T&E 3
- Tools & Equipment for Communication 3
- Telecommunication Devices 2
- Telephone 2
- Battery, Electrical 1
- Cardiograph 1
- Device, Morse Code Instruction 1
- Electrical System Components 1
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