| 摘要 |
The invention relates to a cube (4) that connects straight pipes (2) or bent pipes (2a) with a minimum number of threaded holes (5) to a node (3) by means of connecting means (1) and/or a joint (1a), and the bent pipes (2a) are connected to the corresponding nodes (3) by means of threaded holes (5) that are bored at an angle and a flexible bend-clamping device (10) or bend-expanding means (14) or a joint (1a).
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