| 摘要 |
A replaceable wear part (13, 22, 22a, 32, 41) for mount-ing on a leading edge (12, 27) of a working tool (10, 27, 30), said leading edge and said wear part having co-operative guide formations (16, 18) ex-tending generally perpendicular to the leading edge and which provide a socket and projection type of slidable inter-fit whereby the wear part can be driven by a force extending generally perpendicular to the leading edge in order to take-up a working position in which it is secured against displacement from the working position by frictional inter-engagement between the guide formations (16, 18) on the wear part and the leading edge, and without need for threaded or other separate removable fasten-ers.
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