同步连杆 meaning in English

synchronising (connecting) rod
synchronizing link
synchronous co ecting rod

The greatest feature of this valve is that the ability to take advantage of pipelines within the medium pressure promote hemisphere , therefore , its sudden opening and closing power is stronger than any other type , with such advantages of no friction , no wearing and long life of use
该阀的最大特点是能借助管线内的介质压力推动半球，所以它瞬间启闭力比任何一类球阀都轻快的多，同时在同步连杆和拉簧的作用下，使两半球离开阀座密封面，然后再旋转球体，阀门的启闭过程中有密封面无磨擦、无磨损、使用寿命长等优点。