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- Tools & Equipment for Science & Technology 1508
- Electrical & Magnetic T&E 403
- Electrical System Components 289
- Medical & Psychological T&E 253
- Medical Instruments 166
- Energy Production T&E 116
- Maintenance T&E 110
- Power Producing Equipment 110
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- Instrument, Electrical 97
Maker
- The General Electric Company Limited 18
- Hirst Contact Lens Limited 17
- The Siemens and General Electric Railway Signal Company Limited 15
- General Railways Signal Company 13
- The Westinghouse Brake and Saxby Signal Company 12
- Cooke, Troughton and Simms Limited 11
- Great Britain. Royal Air Force 9
- W Watson and Sons Limited 9
- ShieldsUp 9
- New Zealand Rail 8
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