短語詞組短語curved face cam follower 曲面從動件flat face cam follower 平面從動件face cam driving mechanism 端面槽形凸輪傳動機構face cam mechanism 槽輪機構reabout -face cam 回行凸輪flat -face cam mechanism 平面凸輪機構cam face 凸輪面cam former face 凸輪型面 返回 face cam