| 摘要 |
PCT No. PCT/DE88/00339 Sec. 371 Date Jan. 31, 1981 Sec. 102(e) Date Jan. 31, 1981 PCT Filed Jun. 9, 1988 PCT Pub. No. WO88/10352 PCT Pub. Date Dec. 29, 1988.A protective door device for anti-aircraft installations and nuclear power stations has a door opening in a wall preferably designed as a concrete wall. The opening is surrounded on all sides by the wall and can be closed by means of a protective door which overlaps the wall. The protective door has a central lock and a bowl-shaped metal door leaf reinforced by ribs, from which one-piece support arms project. Two bearing bolts on which two door hinges are mounted are inserted in the wall near the door opening and pockets for adjustable engagement of lock bails of the central lock are arranged in the intrados of the door opening.
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