HUAI

Doors, not of metal; windows, not of metal; framework, not of metal, for building; flashing, not of metal, for building; floors, not of metal; flatforms, prefabricated, not of metals (term considered linguistically incorrect by the International Bureau - rule 13 (2) (b) of the Common Regulations); building panels, not of metals; construction materials, not of metal; plastic-steel door or window (term considered too vague by the International Bureau - rule 13 (2) (b) of the Common Regulations)