134321 ⎘
Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings ; Features of rigidly-mounted outer frames relating to the mounting of wing frames; Wing frames not characterised by the manner of movement; Single frames; Constructions depending on the use of specified materials of metal of special cross-section; Hollow frames of special construction, e.g. made of folded sheet metal or of two or more section parts connected together with a filled cavity