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The PSA method and its process for making oxygen, purifying hydrogen, drying air, refining CO and CO 2, and its application in iron and steel industry are introduced. 介绍了变压吸附制氧，提纯氢，空气干燥，提纯一氧化碳，二氧化碳工艺流程和在钢铁行业中的应用。 - 2
Chengdu Preferred Biological Technology co., Ltd. is a high-tech enterprise dealt in separating, purifying, selling of chemical reference substance and plant effective constituent compound. 成都普菲德生物科技有限公司，是一家专业从事中药对照品及植物有效成分化合物的分离、提纯生产、销售为一体的高技术企业。 - 3
Sichuan Weikeqi Biological Technology Co. , Ltd. is a high-tech enterprise dealt in separating, purifying, selling of chemical reference substance and plant effective constituent compound. 单位简介及产品服务： 四川省维克奇生物科技有限公司，是一家专业从事中药对照品及植物有效成分化合物的分离、提纯生产、销售为一体的高技术企业。
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