1).life-long self-absorption 2).ISO9001, ISO140001 WFB series of non-sealing self-control self-priming pump is to ... steel, reinforced polypropylene, carbon steel, titanium and other materials a series of machine, five different forms of a thousand kinds of ... device", and to eradicate the traditional pump packing seal, packing seals, mechanical seal defects, the total elimination of the "running, take ...