drill columndrill pipe stringdrill stringdrill-pipe stringdrilling stringdrillpipestringline of rodsstring钻杆: bull rod; bar; rod; drill st ...拉紧钻杆柱: take a stretch on pipe悬浮钻杆柱: suspended drill string转矩钻杆柱: torque drill string钻杆柱定向: orienting drill pipe下载手机词典可随时随地查词查翻译