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该文提出了合成切削液pH值高会降低切削液润滑性能的观点,并对其作用机理进行了探讨,建议合成切削液的pH值应控制在8?9.“,”This paper puts forward the view point that the high pH value can reduce the lubricity of water - based synthetic cutting fluids, and inquires into the mechanism of the effect of pH value, and recommends that the pH value is controled in the range8-9.