发明授权
US4637658A Cutters for use in mineral mining 失效
用于矿产开采的刀具

Cutters for use in mineral mining
摘要:
A floor cutter bit for a coal plough has a body carrying a pair of hard metal plates which define a coal face cutting edge and a floor cutting edge. A hard metal pin locates between the plates and receives end zones of the plates within recesses.
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