ZGD series screw self-priming pump Reasonable structure,small size,light weight,high ... high-pressure,self-absorption of the single-phase electric pump.Reasonable structure,small size,light weight,high water pressure ... 1%,praticle size is not At 0.2mm;4.pump should be rated near the head of the ... the 80%easily lead to thermal protectors,so that pump to stop delivery Firms and even damage caused by ...