The switching speed of the upper and lower valves can be adjusted by regulating the spring force of them.
调整阀门的开关速度主要调整阀门的弹簧压力。弹簧压力增加，则阀门的开关速度加快。
2
Compressing the spring rod, the linkage connected mechanically to the rod of the single-acting cylinder turns the fuel regulating shaft to the stop position.
压缩弹簧杆，联动装置机械连接到单作用汽缸的杆上转动燃油调节杆到停止位置。
3
Regulating pilot valve outlet pressure spring can be set.