设置这个压力罐的初衷是防止加热过度产生气泡，而蒸汽气泡的产生是热水无法循环的元凶，盖因蒸汽气泡遇冷凝聚成水，体积会骤然缩小。

来源: 手心手背99 于 2018-12-22 07:47:09 [旧帖] [给我悄悄话] 本文已被阅读：次

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