| 摘要 |
The expanding sleeve (1) of the anchor comprises an interior bore (13) and an expander plug (15) which are conical, with roughly the same cone angle, and designed so as, through the wedge effect caused by the plug (15) being driven into the sleeve (1) to cause it to expand. The sleeve (1) comprises, at its periphery, an annular weakening groove (9) intended, during expansion, to shorten its axial expansion length.
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