| 摘要 |
Retaining plate used to retain trenches and comprised of a plate body (2) with additional parts (8, 14), for example an anvil element or cutting elements which have a generally vertical side aligned with the outer side wall of the plate body (2), and comprised of elements enabling a reciprocal releasable securing (9, 10, 16; 9', 10', 16'), the latter elements being so arranged and formed that the substantially side of the additional part (14) is optionally aligned also with the inner side of the plate body. |
