main column meaning in Chinese

主力纵队
主塔
主柱

Analysis of purity degradation of products from the main column and the argon column
主塔及氩塔产品纯度下降的故障分析
Fluctuation of operating conditions in the main column resulting from the failure of control cabinet for the electric heater
电加热器电控柜故障引起主塔工况波动
《 super av 》 explores the latest av technology and keeps close to the changing market . it consists of three main columns : av & hi - fi and software with broad , rich informative contents to satisfy different interests of our readers
《影音极品》每期为您追击影音最新科技，紧贴市场脉膊，内容广泛充宾，深入浅出，共划分为影音及软件两大部份，迎合不同读者之兴趣。