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DIFF Subgroup
G01V 1/26

Reference-signal-transmitting devices, e.g. indicating moment of firing of shot

Introduced: September 1968

Full Title

Seismology; Seismic or acoustic prospecting or detecting > Recording seismic data > Reference-signal-transmitting devices, e.g. indicating moment of firing of shot

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