| 摘要 |
<p>A roller door assembly comprises a roller door (10) having on its vertical edges restraining means (12, 112), at each edge of the door opposing members forming a gap therebetween, the restraining (12, 112) means being on one side of the gap with the door on the other side thereof, whereby upto a desired pressure or force on the door the restraining (12, 112) means cannot pass through said gaps but at said desired pressure or force the restraining means are compressed and/or the gap expands for the restraining (12, 112) means to pass through said gaps to release the door.</p> |
