阿摩線上測驗
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
答案：登入後查看
統計： A(38), B(63), C(26), D(23), E(0) #3171823
統計： A(38), B(63), C(26), D(23), E(0) #3171823
