問題詳情
49.如圖， A為旋臂，B 、C 各為具有18齒之齒輪，A ，B 及 組成一周轉輪系，齒輪B若被固定，若旋臂依順時針方向旋轉100轉，則齒輪C
(A)順時針方向75轉
(B)逆時針方向125轉
(C)順時針方向233.3轉
(D)順時針方向76轉。
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