The sheet and operation in phthalic anhydride plant system after the adding partial condensator were introduced.

介绍了苯酐装置系统中增加部分冷凝器的流程,操作讨论了加部分凝冷器前后的经济效益.

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The semiconductor flower watering utensil includes semiconductor water condensator, drop irrigation pipe and defrost circuit.

半导体浇花器,它包括半导体冷凝结水器 、 滴灌管和除霜电路.

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