最終更新日：2022/12/24
The feed water enters the back and cool end of the preheater and passes forward to the front and hot end, after which it enters the boiler through a clack valve.
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The feed water enters the back and cool end of the preheater and passes forward to the front and hot end, after which it enters the boiler through a clack valve.
DiQt（ディクト）
無料
★★★★★★★★★★
