| 摘要 |
FIELD: packing, furniture, toys, visual aids. SUBSTANCE: connection forming plates are arranged in relatively perpendicular planes and form one angle in development. Valve and projection are made on edges pointed to each other. Plates are arranged in relatively perpendicular planes. Cut for valve is located along plate conjugation line. End face walls of valve are arc-shaped with radius from point of intersection of lines of plates conjugation. Radius of one arc is equal to distance to the beginning of cut and that of the other, to the end of cut. Cut located on line of conjugation of plates or in parallel with the line. Valve can be arranged in one plane with its plate or square to it. EFFECT: enlarged operating capabilities. 3 cl, 10 dwgr
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