Forward needle valve positions for easy access.

针形阀位置提前，便于接近。

The needle valve lift is the important parameter.

针阀升程是柴油机燃油系统的重要参数。

The design proposal of a novel needle valve assembly is given.

提出了一种新颖的针阀偶件设计方案。

Open vent needle valve and bleed air from hose. Then close vent valve.

开启排气针形阀，并从软管排放空气。然后关闭排气阀。

Needle valve partner is a very important component of a diesel engine.

针阀偶件是柴油机的一个非常重要的零部件。