FS/FSZ chemical pump corrosion resistant acid and alkali resistant plastic pump centrifugal pump self-priming pump head anticorrosive pump head impeller machine seal. Centrifugal pump models. Centrifugal pump head structure without water storage space, the bottom of the inlet pipe needs to be installed with a foot valve, when used, you need to fill the liquid from the outlet, the inlet pipe needs to be filled with liquid before pumping.
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