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DIFF Subgroup
G01L 21/22

using resonance effects of a vibrating body; Vacuum gauges of the Klumb type

Introduced: September 1968

Full Title

Vacuum gauges > by measuring variation of frictional resistance of gases > using resonance effects of a vibrating body; Vacuum gauges of the Klumb type

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