...惯性流动阻力 inertial flow resistance 阀道流动阻力 valve passage resistance 水平矩形窄缝通道内流型、换热和流动阻力特性研究 Investigation of Flow Regimes, Heat Transfer and Flow Resistance of Water...
Fulldiameterstructure of ball valveensures the conformity of inside diameter of passageandpipeline, with the fluidresistanceminimized and easy forcleaning pipeline.