| 摘要 |
Hydraulically raised sectional security door which can be installed in an opening providing access to a room and which essentially comprises a pair of sections in the vicinity of each jamb of said opening, a plurality of panels joined together by means of hinge-type fastening means which allow articulation thereof as well as a device of the hydraulic type for raising the panels, an active safety device for preventing accidental closure of the panels and a security and reinforcing device provided at the bottom of the door itself. <IMAGE> |
