| 摘要 |
<p>The apparatus comprises a central part (1) for extension and compression and two end parts (2, 3) arranged to retain rods 5 supporting fixing vices 6 for transcutaneous pins. The central part (1) comprises an advance part (27) provided in the form of a half cylinder sliding against a second half cylinder, the whole being placed within an outer cylinder (20). <IMAGE></p> |
