| 摘要 |
The invention comprises a male member (11) having an inner lateral surface and a female member (10) having an outer lateral surface both provided with longitudinal grooves (13) and longitudinal protrusions (15) in conjunction with longitudinal protrusions (16) and longitudinal grooves (17). They enable relative longitudinal sliding between the male tube member (11) and the female tube member (10). To avoid and to absorb play between the female tube member (10) and the male tube member (11) adjusting elements (24) are designed which, as shown in FIG. 1, comprise a substantially prismatic longitudinal body at the vertexes of which there are stumps (26).
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