The shape of a cam on a diesel engine dete
题型:单项选择题
问题:
The shape of a cam on a diesel engine determines the valve’s ()
A.point of opening
B.speed of opening
C.lift from its seat
D.all of the above
The shape of a cam on a diesel engine determines the valve’s ()
A.point of opening
B.speed of opening
C.lift from its seat
D.all of the above