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By means of two - step dry mixing - loosening technique, the problem of even dispersing of PSF was solved.
采用 分步 干式开松法解决了芳砜纶的分散问题,应用正交设计法优化芳砜纶摩擦材料的配方.
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The fly ash series dry mixing mortar powder has been developed by using low quality ash.
利用低品质粉煤灰研制出粉煤灰系列干拌砂浆粉.
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