| 摘要 |
<p>The collar (4), matching the tube support beam, fits it so closely that it will remain in position without fixing but when pulled by a simple tool, the collar is flexible enough to slide along the tube. Pins are then pressed through the shutter panel and holes in the collar, and metal wedges are forced into the pins holding the assembly solidly together. The collars can also be shaped to match square section shutter support beams, with or without grooves in one side, and shaped to match straight or angle shutter joints.</p> |
