... 进程专用通信 process specific communication 经济专用通路 economic closed circuit 专用通气立管 specific vent stack ...
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If it can realize the closed circuit circulating of washing-water, can not only increase economic benefit but also can obtain the social benefit in coal preparation factory.
如果能实现洗水闭路循环，不仅能大大提高洗煤厂的经济效益，又能取得良好的社会效益。
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