| 摘要 |
The roller door lock comprises a pivoted plate which, in its equilibrium position, projects into the area of displacement of the roller door, preventing its movement. The plate (1) falls under its own weight to lock the door and is released by a mechanism (5) which can displace the block from its equilibrium position, freeing the door to open. - The mechanism may be manually or electrically operated, and is fitted in a box inserted in the base of the metal section (6) forming the guide track at either edge of the door (4).
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