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循环孔
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冲孔纹样控制循环纸带
endless punched-pattern control-paper
反向循环钻孔施工法
reverse circulation drill method
反循环洗孔钻进方法
counter-circulation wash boring
反循环钻孔
drilling with reversed circulation
反循环钻孔桩
reverse circulation drill pile
喷射式孔底反循环取芯钻具
partial jet hole bottom reverse circulation core barrel
喷射式孔底反循环取芯钻具
bottom-hole partial jet reverse circulation core tool
孔底反循环冲捞器
jet-powered junk retriever
孔底局部反循环
downhole partial reverse circulation
孔底局部反循环钻具
downhole partial reverse circulation tool
正循环回转钻孔
rotary drilling by pumping of mud
钻孔水力循环系统
borehole hydraulic circulating system
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