| 摘要 |
The non-slip system consists of screw connection elements or screw closure elements with cams or grooves ( 4 ) on the face, and of a spanner ( 13 ), also provided with cams ( 16, 17, 18 ), for tightening and loosening them. The side flanks ( 8, 9 ) of the cams or grooves have an S-shaped profile.
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