CPC Subgroup
E04B 9/02 having means for ventilation or vapour discharge
Full Title
Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation (ceilings used as forms for making floors E04B5/00; coverings or linings for ceilings E04F13/00) > having means for ventilation or vapour discharge
2 direct subcodes
Child Classifications
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