Characteristics of cross-joint flush valve: they are time-lapse, self-closing, beeline of water route.
四通冲洗阀特点：延时自闭、水流路径成“一”字型， 适应的水压比较多， 有手柄式、按钮式、脚踏式。
2
The results show that stiffness of spring does not affect the injection rate, but the mass of will affect the needle valveclosing response time.
结果表明，电磁阀铁心弹簧刚度对喷油规律没有影响，但其质量影响针阀落座响应时间；
3
Output speed of electric installations on the determination of its opening and closing the valve when the time is not strictly required, should try to use a slower speed.