They are widespread used for steam, hot water, water, oil goods, gas, metallic, acid alkali and salt technical pipeline as the adjusting and stopping setting.
可作为调节和截止装置，广泛应用于蒸汽、热水、水、油品、煤气、天然气、化工、酸碱盐等工艺管路中。
Anticorrosion: the material for polymer, can completely prevent acid and alkali salt of erosion.
防腐：本物质为高分子聚合物，能彻底防止酸碱盐的侵蚀。
The principles and characteristics were briefly described on the methods of acid dissolution, alkali dissolution, ion exchange and membrane separation for aluminum salt recovery.
简述了铝盐回收的主要方法，分别为酸溶法、碱溶法、离子交换法和膜分离法，对每一种方法的原理和特点作了介绍。
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