12.船軸裂紋主要是指何軸容易發生裂紋的損害?
(A)中間軸
(B)推力軸
(C)艉軸
(D)曲軸
答案:登入後查看
統計: A(4), B(11), C(55), D(5), E(0) #1197882
統計: A(4), B(11), C(55), D(5), E(0) #1197882