fractionation effect
... fractionating tower 分馏柱 fractionation effect 分次效应 fractionation 分级 ...
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本实用新型采用了溶液分次释放，冷效应再次进行的办法，延长了冰袋的保冷时间。
The utility model adopts a method that the solution is released for many times and then the cold effect is conducted again to extend the heat insulating time of the ice bag.
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