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PCE
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CPC Subgroup
E04D 1/24

Roofing elements with cavities, e.g. hollow tiles (E04D1/28 takes precedence)

Full Title

Roof covering by making use of tiles, slates, shingles, or other small roofing elements (roofing supports E04D12/00) > Roofing elements with cavities, e.g. hollow tiles (E04D1/28 takes precedence)