High vacuum will speed up the cooling process while it makes the mass loss increase.
提高真空度可以加快预冷过程,但会增加物料的质量损失。
Uncontaminated water is normally used as seal water for vacuum pumps and for compressor cooling as well as for sanitary use.
未污染的水通常用作真空泵的密封水和压缩机的冷却水以及供保健用。
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