CPC Subgroup
E04D 3/35 Roofing slabs or stiff sheets comprising two or more layers, e.g. for insulation
Full Title
Roof covering by making use of flat or curved slabs or stiff sheets (E04D1/00 takes precedence; built-up roofs E04D11/02) > Roofing slabs or stiff sheets comprising two or more layers, e.g. for insulation
3 direct subcodes
Child Classifications
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