CPC Subgroup
E04H 12/08 of metal
Full Title
Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures (cooling towers E04H5/12; derricks for oil drilling E21B15/00) > Structures made of specified materials > of metal
2 direct subcodes
Child Classifications
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- E04H 12/10 Truss-like structures