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thermionic vacaum ga(u)ge
thermionic vacuum ga (u)ge
thermionic vacuum tube
thermionic valve
thermionic valves
thermionic voltmeter
thermionic work function
thermionics
thermischer
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thermionic valves
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thermionic valves
Definitions
[1]
[医]
热离子管, 热电管(热阴极整流管)
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thermionic valves