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反循环钻机
eng.geol. reverse circulation rig
hydroel.st. reverse rotary rig
oil clean-out machine
反循环钻机采用泥石泵从孔底将携带岩渣的泥浆吸出的钻孔机械
expl. reverse circulation drill
反循环钻机: 13 phrases in 4 subjects
Bridge construction2
Engineering geology3
Hydroelectric power stations2
Technology6

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