A synthetic method of partial ester of carboxylic acid (PECA) surfactant was given in the paper.
文章提供了一种羧酸偏酯(简称PECA)表面活性剂的合成方法。
Throuhg the products and service provided by PECA, PECA gradually make serious compromisr in promoting human development.
通过佩克提供的产品和服务，决定了佩克在促进人类进步方面作出的承诺。
Through establishing mutual benefit relationship between PECA and world-class service is the most important case in ourbusiness.
佩克通过建立世界级产品和服务基础上的互惠互利关系，得以为广大客户提供最高的价值。
Through establishing mutual benefit relationship between PECA and world-class service is the most important case in ourbusiness.
佩克通过建立世界级产品和服务基础上的互惠互利关系，得以为广大客户提供最高的价值。
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