名词
中文翻译：初级运输
同义词：
['primary transportation', 'primary loading']
例句：
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1. The company's primary haulage is coal.
该公司的初级运输主要是煤炭。
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2. The train was carrying a large load of goods on its primary haulage route.
火车在它的初级运输路线上运送着一大宗货物。
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3.The farmers used to transport their produce by horseback on their primary haulage routes.
农民过去常常通过他们的初级运输路线骑马运送农产品。