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PCE
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DIFF Subgroup
C21D 9/04

for rails

Introduced: September 1968

Full Title

Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor > for rails

IPC and CPC are identically structured here. All 1 subcodes exist in both systems.

Child Classifications

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  • C21D 9/06 with diminished tendency to become wavy IPC+CPC Available in IPC and CPC