DIFF Main Group
G01M 9/00 Aerodynamic testing; Arrangements in or on wind tunnels
Introduced: September 1968
IPC and CPC are identically structured here. All 3 subcodes exist in both systems.
IPC defines codes here since 1990.
Child Classifications
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- G01M 9/06 Measuring arrangements specially adapted for aerodynamic testing since 1990 +2 CPC IPC+CPC Available in IPC and CPC