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58 phrases
in 15 subjects
Antennas and waveguides
1
Electricity generation
7
Electronics
8
Isolation
1
Lighting
other than cinema
1
Mathematics
1
Microsoft
18
Power system protection
2
Radio
2
Radiology
1
Satellite communications
2
Telegraphy
1
Telephony
1
Thermal Energy
4
Vacuum tubes
8
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