CPC Subgroup
E04G 15/06 for cavities or channels in walls of floors, e.g. for making chimneys
Full Title
Forms or shutterings for making openings, cavities, slits, or channels (forming part of shuttering for walls E04G11/06 ) > for cavities or channels in walls of floors, e.g. for making chimneys
2 direct subcodes
Child Classifications
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