1弄清楚電池內阻的概念,舊電池那怕100v都沒用。2萬用表誤差，機械表要校0數字表電池要足

來源: 味苦於 2019-02-14 12:59:09 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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