reverse circulation drill 反循环钻机
percussion reverse-circulation drill 冲击反循环钻机
percussive reverse-circulation drill 冲击反循环工程钻机
reverse circulation drill-in 反循环钻进
reverse circulation percussive drill rigs 冲击反循环工程钻机
drill reverse circulation
钻反循环
以上为机器翻译结果，长、整句建议使用 人工翻译 。
During the third quarter, the company continued what it described as an aggressive drill campaign with 13 core and 10 reverse circulation rigs in operation.
FORBES: Kinross: Tasiast-Expansion Commitment To Hit $1 Billion By Year-End; Production Set For 2014
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