| 摘要 |
<p>The frame for a marquee comprises, in its upper part, several slightly inclined tubes (2). These tubes converge at their upper end (2') to form the top of the marquee. Each tube is connected at its other end to a tubular upright (3) which is supported on the ground. The top ends of the tubes are folded down and located parallel to each other and fixed together by several bolts (4) which pass through them. The bolts are fixed one to the other in their middle to form a single crosspiece.</p> |
