| 摘要 |
The kit has a metal joint (6) for joining the long metal sections (2, 3, 4). The metal joint has two expanding end sections (9), each end section has two components (10a, 10b, 11a, 11b, 12a, 12b) which move apart from each other and are controlled by a spacing mechanism (14) so that they press against the inner surface of the sleeve (8) at the end of the long metal sections. The end sections consist of the ends of bars or strips of metal (10, 11, 12) and one of the bars (13) has a threaded hole (13) into which a screw is inserted which moves the bars apart as the screw presses on the surface of the bar below the threaded hole.
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