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PCE
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DIFF Subgroup
E01B 5/16

Distance keepers

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Rails; Guard rails; Distance-keeping means for them > Distance keepers

CPC:

Rails; Guard rails (manufacture of rails B21B); Distance-keeping means for them > Distance keepers

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