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DIFF Subgroup
G01L 21/28

using torsional rotary measuring members

Introduced: September 1968

Full Title

Vacuum gauges > by making use of radiometer action, i.e. of the pressure caused by the momentum of molecules passing from a hotter to a cooler member; Vacuum gauges of the Knudsen type > using torsional rotary measuring members

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