Dr. Hadjipanayis found a path through the right side and began drilling.
哈德吉潘博士在右边发现了一条通道，开始钻孔。
The development of automatic and air driven boost device for air chamber of drilling pump will provide reliable assurance for the normal working of drilling pump and safe and high quality Dr...
空气包自动气动增压充气装置的研制为钻井泵的正常工作和安全优质钻井提供了可靠保证。
Onthe basis of above judgement, this system can also discover three kinds of accidents the drilling head break, the steel rope break and dr…
还能对断钻头、断绳和卡钻三种故障进行检测和报警。
Onthe basis of above judgement, this system can also discover three kinds of accidents the drilling head break, the steel rope break and dr…
还能对断钻头、断绳和卡钻三种故障进行检测和报警。
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