短语词组短语drill -string in compression 钻杆受压casing drill -in [矿业]套管送下程序impact drill -in 冲击钻进prd drill -in fluid prd钻开液reverse circulation drill -in 反循环钻进drill hole for in -situ leaching 地浸钻孔tip -in drill 门前补射练习 返回 drill in