1)jack leg,钻机腿2)air-feed leg dril,气腿式钻机3)air-leg diamond drill,气腿式金刚石钻机4)four-leg drill derrick,四腿钻塔5)two-leg pipe derrick,双腿管式钻塔6)feedleg,风动钻架;气腿
用法和例句
A dismantling and assembling machine for four-leg drill derricks and a mechanically assembleddrill derrick have been developed, which are thought to the trend of the geologic drill derrick.
