Regarding the screw centrifugal pump, most domestic manufacturers now produce submersible screw pumps, that is, the impeller is improved on the basis of the open impeller of the submersible sewage pump. Most of the applications are used for submersible sewage in sewage treatment. On the basis of the

Regarding the screw centrifugal pump, most domestic manufacturers now produce submersible screw pumps, that is, the impeller is improved on the basis of the open impeller of the submersible sewage pump. Most of the applications are used for submersible sewage in sewage treatment. On the basis of the