timing control valve正时控制阀
Timing electromagnetic valve延时电磁阀
timing spool valve正时滑阀
timing advance spool valve点火提前滑阀
Timing valve tap延时阀龙头
variable timing valve actuators可变气门驱动
Timing controlled by valve阀控调速
starting air timing valve起动空气定时阀;起动空气分配阀
mercury timing valve水银延时装置