| 摘要 |
The tube 1 is introduced over the tube 2 when the desired direction is obtained, and, in order to lock the assembly, it suffices to tighten the wing-headed screw 3. The tube 5 being fixed on a hinge axis, it remains only to select the other direction. In order to fold up the assembly, loosen the wing-headed screw 3 and fold up the tube 5 which pivots in two directions parallel to 2 or to 6. <IMAGE>
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