A new presulfidation process of hydrotreating catalyst in the hydrogenation is introduced.介绍了一种加氢催化剂器内预硫化新工艺.Determination method of Pd content in hydrotreating catalyst by ICP - AES was established.建立了采用电感耦合等离子体发射光谱(ICP...
其精练的名词术语与分类特征常常对工程是有意义的.Its refined terminology and class distinctions are frequently meaningful for engineering work.典面是指典故的相对稳定和精练的语言表达形式.The form of allusion refers to steady and concise expression of language.格言,警句蕴含...