[課業] 機件原理-齒輪齒數計算
兩互相嚙合之正齒輪，轉向相反，模數為5，轉速比為3：2，中心距離為250mm，則大齒輪
齒數為多少？
兩互相嚙合之正齒輪模數相同，故M皆為5
公式：
C = (D1-D2) / 2
= (T1-T2) * PC / 2拍
= (T1-T2) * M /2
然後就卡住不知該怎計算了 = =?
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