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利用Anton Paar DMA4500振动管密度计, 测量了293.15 K时二元体系C 6 H 6 -DMF(苯- N,N -二甲基甲酰胺)溶液的密度, 利用最小二乘法确立了溶液密度与组成的函数关系. 利用密度数据分别计算了二元体系中C 6 H 6 和DMF的表观摩尔体积, 并利用非线性最小二乘拟合法, 分别拟合得到了优化的C 6 H 6 和DMF的表观摩尔体积和摩尔分数的函数关系, 以及C(More)
A novel diamond drill bit comprises a drill bit body, diamond permanent teeth are arranged on the end surface of the drill bit body, hard alloy permanent teeth are further arranged on the end surface(More)