small and medium mining enterprises
small and medium mining enterprises
中小型矿山企业
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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A radial well on the river bed is an efficient construction for taking in the water supply engineering. It is suitable for small and medium-sized towns, industrial and mining enterprises.
河床辐射井是给水工程中一种效果很好的取水构筑物，它适用于中小城镇和工矿企业。
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