摘要 |
The device has a knurled thumb wheel (17) which is accessible in an opening position of a gripping lever (10). The wheel is activated to vary the distance between articulation axles (13, 14), when the lever is in the opening position. A hooking tension between a hook and a gripping unit is adjusted, when the lever is in top position. A slot (18) is provided on an end of the lever corresponding to a level grip zone.
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