DIFF Subgroup
G01L 21/02 having a compression chamber in which gas, whose pressure is to be measured, is compressed
Introduced: September 1968
Full Title
Vacuum gauges > having a compression chamber in which gas, whose pressure is to be measured, is compressed
IPC and CPC are identically structured here. All 1 subcodes exist in both systems.
Child Classifications
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- G01L 21/04 wherein the chamber is closed by liquid; Vacuum gauges of the McLeod type IPC+CPC Available in IPC and CPC