| 摘要 |
<p>The adjustable support consists of a frame in the form of a hollow housing. One of the surfaces has a support inside which is a cavity for a handle which can slide into the frame. Two extensions (14) protrude from the rim of the frame forming a cover into the bottom of which is a hole for the handle (16), of the same cross-section. Each arm of the cover has, on its inner surface a lengthwise slot at right angles to the hole, for a crosswise axle (18) on the handle.</p> |
