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二、石油大家庭的第一代产品为了使大家更清楚石油“宝库”中的各种产品在工业、农业、交通运输、国防和日常人民生活中的重要性,这里再列举如下石油产品。透明的汽油汽油可分为车用汽油和航空汽油两种。车用汽油是作为开动各种型式活塞式发动机汽车的动力;而航空汽油则供装有活塞式发动机的螺旋桨式飞机使用的。判断汽油好坏有二个主要评价指标。第一个是汽油的馏分组成。什么是馏分组成呢?在炼油厂实验室里
Second, the first generation of oil family products In order to make everybody more clear petroleum “treasure house ” in the various products in the industry, agriculture, transportation, national defense and the importance of daily life, then here are the following oil products . Transparent gasoline Gasoline can be divided into two kinds of gasoline and aviation gasoline. Motor gasoline is used as a starting point to power all types of piston engine vehicles; and aviation gasoline is used for propeller engines equipped with piston engines. Judging the quality of gasoline has two main evaluation indicators. The first is the composition of the gasoline cut. What is the composition of the distillate? In the refinery lab