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PCE
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DIFF Subgroup
A63B 37/04

Rigid cores

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Solid balls; Marbles > Special cores > Rigid cores

CPC:

Solid balls; Marbles (heavy throwing balls A63B65/06) > Special cores > Rigid cores

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