1)You are heading into a blind alley,你正在钻牛角尖2)tip angle of drill bit,钻尖顶角3)drill point angle,钻尖角4)Drill-point angle,顶角/钻尖角5)Double-angle point,双顶角钻尖6)The point of an anvil.,铁钻的尖角
用法和例句
This paper analyses that tip angle of drill bit influences on cutting capability and life of twist drill, when the material and shape of work piece is different.