厚度計算角度更準確，幾刀的指針角度儀讀數誤差大，調平算水平分力合力的方法很簡潔優美，學習啦！:-)

來源: 5W40 於 2020-10-17 16:08:30 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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