变电站电气主接线是指变电站的变压器、输电线路怎样与电力系统相连接，从而完成输配电任务。变电站的主接线是电力系统接线组成中一个重要组成部分Part 1 Chemical Process IndustryUnit 4 Sources of Chemicals变电站电气主接线是指变电站的变压器、输电线路怎样与电力系统相连接，从而完成输配电任务。变电站的主接线是电力系统接线组成中一个重要组成部分The number and diversity of chemical compounds is remarkable: over ten million are now known. Even this vast number pales into insignificance（黯然失色）when compared to the number of carbon compounds which is theoretically possible. This is a consequence of catenation (链状排列), i.e. formation of very long chain
