DIFF Subgroup
G01N 7/14 by allowing the material to emit a gas or vapour, e.g. water vapour, and measuring a pressure or volume difference
Introduced: September 1968
Full Title
Analysing materials by measuring the pressure or volume of a gas or vapour > by allowing the material to emit a gas or vapour, e.g. water vapour, and measuring a pressure or volume difference
IPC and CPC are identically structured here. All 2 subcodes exist in both systems.
Child Classifications
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