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转回
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中心取样回转钻机
Center Sample Rotary
反循环回转钻进
reverse circulation rotary drilling
回转
revolving
回转压力给进系统
rotation pressure controlling feeding
回转破碎机
gyratory breaker
回转空气吹洗〔井底〕
rotary air blast
回转速度
rate of return
循环回转钻进
circulation rotary drilling
连续取样回转钻机
continuous sampling rotary
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