volumetric method短语¹⁴⁴⁹⁷²⁺² 基本例句 体积法,体积比配料法 The adsorption isotherms of ammonia on HZSM-5 which was calcined at various temperatures were measured by means of the static volumetric method. 测得了不同焙烧温度和不同抽空温度下氨在 HZSM-5上的热脱附谱，计算了测定条件下所相应的 HZSM-5的表面酸中心数。 cnki