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书湿后放冷冻还是冷藏
更新时间: 2021-11-24 22:21:54  

1、书湿后用重物压平,包上保鲜膜,后套上方便袋,放冷冻,但不要冻太久,大概4~6小时(可适当加长),拿出书后用干抹布包住,待常温下冷却后,书就不会出现褶皱,同时也不会有水气。

2、冷冻,指降低温度,使物体凝固、冻结。也叫“制冷”,是应用热力学原理,用人工制造低温的方法,冰箱和空调都是采用制冷的原理。从化工的角度,一般都是采用一种临界点高的气体,加压液化,然后再使它汽化吸热,反复进行这个过程,液化时在其他地方放热,汽化时对需要的范围吸热。

关键词: 冷冻 还是 冷藏

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