1)rod pulling,拉出钻杆2)tension proof drilling rod,抗拉钻杆3)drill pipe tension,钻杆拉力4)strip the drill pipe,提出钻杆5)copper rod withdrawal,铜杆拉出6)take a stretch on pipe,拉长钻杆定卡点
用法例句
It is necessary base on the imbalanced drilling theory to study the pull-out drilling technology for mine gas geology and to systematically study different accidents,tension proof drilling rods and right and left directional integrated bits for the drilling bore- holes.
