The PCB wastewater of Dajin Electronic Co. , Ltd is divided into washing wastewater, organic wastewater with high concentration, complexed wastewater, concentrated acid waste liquor etc.
本文介绍的达进电子有限公司PCB废水分为：清洗废水、高浓有机废水、络合废水、浓酸废液等废水。
By the use of the new nitrating agent, the use of concentrated sulfuric acid was avoided and the reaction was environmental friendly with high atom economy.
该方法通过改变硝化剂，不仅成功地避免了浓硫酸的使用，而且提高了原子经济性，具有良好的环境效益。
The high temperature and high concentrated acetic acid or contain other corrosive media, and other harsh requirement, the choice of high-alloy stainless steel or plastic pump fluoride.
对于高温高浓醋酸或含有其它腐蚀介质等苛刻要求时，可选用高合金不锈钢或氟塑料泵。
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