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我讀了“水力發电”1957年第5、6期吴中伟先生所發表的“在水工混凝土中节約水泥的意义和方法”一文收获很大。对今后进行大規模水电建設节約建筑材
I read “hydroelectric power” 1957 fifth and fifth Mr. Wu Zhongwei published “meaning and method of saving cement in hydraulic concrete” article reap great harvest. Large-scale hydropower construction in the future to save building materials