| 摘要 |
A cylindrical security door which revolving between the left and the right cambered doorcase (3, 4) is hollow columniform without upper and lower surface. On the side face of the cylindrical door (1) there is a rectangular opening (2) with the radian less than 90 DEG , the ratchet wheels (9, 10) and the control wheels (11, 12, 13) are mounted on the upper end of the cylindrical door (1) and the worm wheels (7) and the worms (8) are mounted on the lower end, the circuit control device is mounted on the doorcase and the catch tools are mounted on both of the upper and the lower doorcases. |
