| 摘要 |
A self renewing working tip tool characterized by a plurality of working tip surfaces on individual laminae assembled in nested relation. The laminae are of hardened steel and each has a hard metal carbide coating thereon. A series of such laminae are bonded together and secured to a suitable tool shank to form a tool useful in breaking concrete, mining coal, and the like, where a hard working surface is required. These tools have an extended working life compared to conventional embodiments.
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