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PCE
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DIFF Subgroup
G01B 21/30

for measuring roughness or irregularity of surfaces

Introduced: January 1980

Full Title

Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant > for measuring roughness or irregularity of surfaces

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