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水电站设计的各个方面都特别强调环保,这就导致了对水力机械的有关研究和开发。瑞典的研究和开发计划提出减少甚至取消转桨式转轮中润滑油的理念。
All aspects of the design of hydropower stations place particular emphasis on environmental protection, which has led to the research and development of hydraulic machinery. The Swedish research and development program proposes to reduce or even eliminate the concept of lubricating oil in a paddle wheel.