... ISO140001 WFB series of non-sealing self-control self-priming pump is to fill the ... and reliable, in particular, used the term "electric air control valve", truly a "one-draining, life-long self-priming." ... to foot fixation. 5, with excellent self-control function, and high-tech areas and supporting the ... of outdoor enclosures, the work in the open air circumstances, Effective rain, fog, moisture; carts ...