FIELD: civil engineering, double folded doors in living and process rooms. SUBSTANCE: internal fold is equipped with external connecting member, external fold is equipped with internal connecting member. The folds are inserted into an aperture and concurrently they are fixed in the aperture by locking from inside by turning external connecting member. When locking from outside internal connecting member is turned using secret mechanism. There is an option of concurrent fixing the folds in several points when locking from outside, and individual fixing when locking from inside. Use of two secrete mechanism is provided. EFFECT: high reliability. 14 cl, 14 dwg
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