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DIY新年吉祥物紐扣畫
$4.90
有效量程：0.5-5/6.4-8/5.5-9/9-14/1-14/5.4-7.0/6.9-8.4/8.2-10
使用方法：將所需檢測的液體滴到或沾抹在PH試紙，幾乎無需等待即可反映並顯現，然後與附帶的標准色卡比較，得出PH值。
