20.下列何種材料須加磁飽和,以利渦電流檢測?
(A)鋁
(B)低碳鋼
(C)黃銅
(D)銀
答案:登入後查看
統計: A(0), B(3), C(0), D(0), E(0) #2921751
統計: A(0), B(3), C(0), D(0), E(0) #2921751