| 摘要 |
The bracket has two angle pieces, one (1) at 90 degrees the other (2) at greater than 90 degrees, provided with a clamping screw (3) which exerts a tension which tends to separate the two lower arms of the piece. This action takes up all the play, which was previously necessary for the mounting and fixing of the two tubes (t1,t2) together. The screw (3) also serves as the fixing point of the piece onto one of the tubes.
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