| 摘要 |
The apparatus comprises a tube 1 supporting the grip, a tube 2 for holding and wear, a nut 3 immobilising the wear piece no. 2, an upper tube 4, a nut 5 placed in the piece 4, a bolt 6 serving to fasten the grips, a piece 7 supporting the brake, a shoe (block) of the brake 8, two elements 9 and 10 of pieces forming the collar 11, a strong elastic 11, 12, 13 and 14, three bolts 12, 13 and 14 and their nuts, a link 15, two nuts 16 and 17 for immobilising the link, a spring 18, two washers 19 and 20, a lower tube 21, tension-adjusting nuts 22, heels 23 chosen as required, a reinforcement tube 24, two bolts 25 and 26 and their nuts and a protective sheath 27. <IMAGE>
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