| 摘要 |
A replaceable anchor contains a body, and the body includes an extension, at least one slot, a screwing stem, and a nut. The extension is hollowly tubular and has the at least one slot defined thereon and the screwing stem inserting through and extending out of the extension so as to screw with the nut. The extension has a circular rib extending outwardly around one end thereof and being perpendicular to the extension, such that the extension is fixed into the hole, and the circular rib contacts with the wall. |
