| 摘要 |
The present invention provides an anchor (1) comprising two general triangular plates (2, 3) and pivotal mounting means (4, 5, 6, 8 and 9) which mounts an edge of one of the two plates to an edge of the other of the two plates whereby the plates can be pivoted about an axis from a first position in which they overlie one another to a second position in which they extend from one another. |
