computerized drill and practice  计算机化的演习

Drill and practice courseware  操练与练习型课件

athletics and drill  运动训练

combined core drill and reamer  扩铰复合刀具

combined drill and countor sink  中心钻

combined drill and milling cutter  复合钻铣床

combined drill and reamer  钻铰两用刀

combined pipe tap and drill  管用钻孔攻丝复合刀具

drill and blast method  钻爆法; 爆钻法

drill and blast method tunnel  钻爆法施工隧道

drill and blast parameters  钻爆参数选择

drill and blast plan  钻爆方案

Drill and blast tunneling  矿山法隧道

drill and countersink  中心钻; 定心钻

drill and countersink combination  尖角钝角两用钻

Drill and needle integration  针钻一体

Drill And Steel Wire Gage  钻径及钢丝规

drill-and-blast method  钻爆法

instruction in drill practice  练习教学