問題詳情

39. Gears can be manufactured by which of the following mnachining operation:
(A) powder metallurgy,
(B)shaving,
(C) grinding,
(D) form cutting, or
(E) all of the above?

參考答案

答案:[無官方正解]
難度:計算中-1
書單:沒有書單,新增