| 摘要 |
Traction module comprising a casing (1) on which is hooked a disjunction member (2), said casing containing a spring (3) traversed by a rod (4) which extends at one of its ends outside said casing and having at the other end a head (5) for compressing said spring, characterized in that the spring (3) bears at its extremity opposite to the head (5) against a surface (8) which may be continuously displaced, inside said casing, in a direction perpendicular to the axis of the rod (4).
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