天然泉水：最好的是砂岩水，砂岩石英含量越高，水質越好，是軟水。石灰岩高鈣，是硬水；

來源: 信筆由墨於 2022-09-25 13:18:10 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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