CPC Subgroup
E21F 15/02 Supporting means, e.g. shuttering, for filling-up materials
Full Title
Methods or devices for placing filling-up materials in underground workings (dams E21F17/103 ) > Supporting means, e.g. shuttering, for filling-up materials
1 direct subcode
Child Classifications
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- E21F 15/04 Stowing mats; Goaf wire netting; Partition walls