A-A+
The purpose of the delivery check valve used in a diesel fuel injection jerk pump is to __..
问题详情
A.assist in a quick cutoff of fuel injection
B.allow oil backflow from the injector to the helix
C.reduce fuel oil pressure between injection strokes
D.meter the quantity of fuel delivered
请帮忙给出正确答案和分析，谢谢！
