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The rails were key to moving 130 tons of material in a five-month period; they also reduced the time taken for tunnellers to reach the digging faces.

軌車(chē)系統(tǒng)關(guān)鍵性地確保了130噸材料的運(yùn)輸在5個(gè)月內(nèi)得到完成；同時(shí)也減少了挖掘者到達(dá)施工點(diǎn)所需要的時(shí)間男人天堂AV综合网。

The tunnellers also installed small rail car systems for moving sand more quickly, much like the systems used in old mining operations.

修筑者們還引進(jìn)了類(lèi)似舊式采礦系統(tǒng)中使用的小型軌車(chē)系統(tǒng)以便更快地運(yùn)輸砂土囯产自拍久久视频。

The tunnellers also installed small rail car systems for moving sand more quickly, dddtt.com like the systems used in old mining operations.

修筑者們還引進(jìn)了類(lèi)似舊式采礦系統(tǒng)中使用的小型軌車(chē)系統(tǒng)以便更快地運(yùn)輸砂土。

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