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The main purposes:
1, In the chemical industry is the manufacture of chemical fertilizers, inorganic, synthetic fiber, dyes, medicines and food industry's raw materials.
2, In the oil industry for refining petroleum products.
3, In the defense industry, used in the manufacture of explosives, poisons, such as Smoke.
4, in the metallurgical industry for smelting pickling.
5, In the textile industry for dyeing and bleaching, and so on.
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