taper hole meaning in Chinese

锥孔
锥形孔

New method for machining long tapered holes with center lathe
一种用普通车床加工长锥孔的新方法
The parts and units of jigs and fixtures . inner taper hole centre
机床夹具零件及部件.内锥孔顶尖
The parts and units of jigs and fixtures . holding inner taper hole centre
机床夹具零件及部件.夹持式内锥孔顶尖
Theory research on the maximum reduction of deep tine taper hole formed by open - die cold extrusion
深小锥孔挤压成形极限变形程度理论判据建立