本文详细介绍了BS模型，并就这个模型的一些不同的定义和研究方向做了对比。
The BS model is introduced in detail, and some different definitions and research about the model are compared.
详细介绍了树脂床工作过程和酸净化装置的工作原理及工艺流程，对酸净化装置投入前后的酸耗量做了对比。
The working process of resin bed and working principle of acid purification unit and flowchart are described particularly. Making comparison of acid consumption of using it before and after.
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