| 摘要 |
The present invention provides a permanent anchor. The permanent anchor includes: an extension unit which can be extended by being expanded in a bunched state; a control member which is inserted into the extension unit by going forward and expands the extension unit; and a driving means which drives the control member to go forward from a reverse point. Accordingly, the permanent anchor can be expected to significantly enhance the fixing power or the resistance to tensile force. |
