- novel drilling method
- 新: new; fresh; novel; up-to-dat ...
- 钻井: borehole; well drilling
- 方法: method; means; way; techniqu ...
- 钻井方法: boring method; boringmethod; drilling method; system of drilling; systemofdrilling
- 回转钻井方法: rotary system of drilling; rotarysystemofdrilling
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