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DIFF Subgroup
H01J 13/14

Cooling, heating, circulating, filtering, or controlling level of the liquid

Introduced: September 1968

Full Title

Discharge tubes with liquid-pool cathodes, e.g. metal-vapour rectifying tubes > Details > Main electrodes; Auxiliary anodes > Cathodes > Cooling, heating, circulating, filtering, or controlling level of the liquid

No child classifications to compare. This is a leaf node in both IPC and CPC.