問題詳情
4. When the pistons, piston rings and cylinder liners are replaced with the new ones, perform
the ________ in order to prevent the seizure and abnormal wear.
(A) bear ring
(B) grinding ring
(C) back up ring
(D) wearing vane
參考答案
答案：B
難度：計算中-1
書單：沒有書單，新增