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- Abstract: The paper introduces the structure,working principle and absorbing water capablitity.Through test and actual application shows that i t can fulfill the requirement of reacting cycle drilling well. 文摘:介绍双缸拉杆活塞泵的结构、工作原理及吸水能力，并通过实验和现场使用，证明其能满足反循环式钻井的要求。
- The essence of underbalanced drilling is pressure control drilling.To realize pressure control drilling requires to establish cycle drilling system and to maintain the undervoltage condition. 欠平衡钻井的实质是压力控制钻井，要实现压力控制钻井就必须建立带压循环钻井系统和维持欠压条件。
- underwater drilling blasting shock wave 水中冲击波
- Producting hole technology by rotary reverse cycle drill in gravel layer 回转式反循环钻机在卵、砾石层的成孔工艺
- The drilling troops mustered on the hill. 演习部队在小山上集合起来了。
- The pedal of a cycle is attached to a crank. 自行车的踏板与曲柄相连。
- Investigation on Calculating Formula of Vibration Velocity in Drilling Blasting and Its Simplification 钻孔爆破振动速度计算公式及其简化的探讨
- The workman is drilling in the wall. 工人正在墙上打孔。
- Drilling is cutting a hole with a drill. 钻削就是用钻头钻一个孔。
- It's easier to cycle with the wind behind you. 顺风骑车省力。
- A unit of frequency equal to one cycle per second. 赫兹频率的单位，等于每秒一周
- The noise of the drilling is intolerable. 钻孔的噪音让人受不了。
- The seasons of the year make a cycle. 一年四季构成一个循环。
- Causes of Blind Shots during Underwater Drill Blasting for Pantan Shoal and its Prevention Measures 湴滩水下钻孔爆破盲炮的成因及预防措施
- The business cycle experienced a sudden down. 商业周期经历了突然的萧条。
- This is the cycle of economic booms and slumps. 这是经济繁荣和经济萧条的周期变化。
- Cycle across America? Sounds a bit dodgy to me. 骑自行车横越美国? 听起来有些冒险。
- The pedals of a cycle are attached to a crank. 自行车的踏板与曲柄相连。
- The pedals of a cycle are attached to the crank. 自行车的踏板与曲柄相连。
- Her latest stunt is riding a motor cycle through a ring of flames. 她的最新特技表演是骑摩托车钻火圈。
