137. 車載式之拌和機拌和時之最低轉速為
(A)4rpm
(B)7rpm
(C)10rpm
(D)14rpm
答案:登入後查看
統計: A(0), B(1), C(0), D(0), E(0) #3758063
統計: A(0), B(1), C(0), D(0), E(0) #3758063