2. What purposes is not compressed air used on board ship?
(A)Starting engine
(B)Supply engine for burning
(C)For pneumatic tools
(D)Cleaning equipment
答案:登入後查看
統計: A(0), B(2), C(0), D(0), E(0) #4067947
統計: A(0), B(2), C(0), D(0), E(0) #4067947