1)margin of drill,钻头切削边缘;钻锋圆边2)double margin drill,双边钻头3)chipping type bit,切削型钻头4)drill edge,钻头切削刃5)bit cutting angle,钻头切削角6)large cutting element drill bit,大切削具钻头
用法例句
On the basis of experiment results from rock fragmentation by slantly penetrated cutting toolsthe drilling process of large cutting element drill bits is analysed and the penetration rate formulae for large cutting element drill bits in the case of rotary drilling is also derived.
