FIELD: construction engineering. SUBSTANCE: window, door, or the like has fixed frame and folding frame or leaf loosely mounted on fixed frame by means of accessories. Fixed frame and/or folding frame is assembled of prefabricated angle pieces and frame pins jointing them together. Accessories inserted between fixed frame or folding frame or leaf are mounted on prefabricated angle pieces before frame angle pieces and frame pins are joined together. Frame pins may be cut off together with pushers; these pins abut each time against members of force transmitting links in corner rounding tools. As no joints are required between members of closed force transmitting link, the latter is closed upon joining frame pin and corner rounding tool with pusher abutting against force transmitting link. EFFECT: facilitated manufacture. 22 cl, 17 dwg
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