CPC Subgroup
E21D 5/06 with iron or steel (E21D5/01, E21D5/012, E21D5/016 take precedence)
Full Title
Lining shafts; Linings therefor (E21D11/00 takes precedence ) > with iron or steel (E21D5/01, E21D5/012, E21D5/016 take precedence)
2 direct subcodes
Child Classifications
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