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Classification
H01J
H01J2217/00
H01J2217/04
H01J2217/06
ClassID:
205927
⎘
H01J2217/06 - CPC Classification
Classification description:
Gas-filled discharge tubes; Electrodes Cathodes
Sub-classes:
H01J2217/062 »
thermionic
0
H01J2217/065 »
heated by the discharge
0
H01J2217/067 »
Cold cathodes
1