piercing
特殊用法die piercing1.■(金刚石的)拉模钻孔, 冲孔模fault piercing1.■断层掘进free piercing1.■自由冲孔fusion piercing1.■熔化穿孔hot piercing1.■热冲孔, 热穿孔hydraulic piercing1.■液压穿孔, 水力穿孔multiple piercing1.■多孔冲孔nut piercing1.■螺母冲孔rotary piercing1.■回转冲孔, 旋转穿孔, 辊式穿孔shaft piercing1.■竖井掘进tunnel piercing1.■隧道掘进piercing by electric arc1.■(制造钻石模用)电弧穿孔
考试词汇表
