| 摘要 |
The invention relates to a device for joining tubes of scaffolding together, device including a rose (block) (2) in the form of a disc welded to a vertical upright, a spindle secured to the horizontal member to be fixed to the upright, a key securing the spindle to the rose (block); the key cannot be lost and has the shape of a fork with two strands, namely a slightly tapered clamping strand and a guide strand. Application: construction of metal structures, scaffolding. <IMAGE>
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