开球进口KITZ阀门、三片式法兰球阀:三片式法兰球阀和闸阀是同属一个类型的阀门，区别在它的关闭件是个球体，球体绕阀体中心线作旋转来达到开启、关闭的一种阀门。 球阀在管路中主要用来做切断、分配和改变介质的流动方向。三片式球阀是近年来被广泛采用的一种新型阀门。
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