关键词:水平定向钻机;管道;回拖拉力;安装 [gap=657]Key words: horizontal directional drilling machine; pipe; back dragging force; installation
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back dragging force
回拖力
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Recognising that this would allow the economy to grow faster without fuelling inflation, Mr Greenspan allowed the boom to continue and unemployment to fall, dragging many disadvantaged workers back into the labour force.
ECONOMIST: Alan Greenspan
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