题目

Shaker, circulation and spray are the three general methods used in __________A.pre-injection fuel oil treatmentB.lube oil filtrationC.lube oil purificationD.piston cooling

Shaker, circulation and spray are the three general methods used in __________A.pre-injection fuel oil treatment
B.lube oil filtration
C.lube oil purification
D.piston cooling

题目解答

答案

D