12. 一般鑄件之外形拔模斜度約為:
(A)1~2%
(B)2~3%
(C)3~6%
(D)5~10%
答案:登入後查看
統計: A(114), B(55), C(17), D(6), E(0) #2890389
統計: A(114), B(55), C(17), D(6), E(0) #2890389