... .3pole1,Integrates the functions of submersible pump, ordinary self-priming pump on land and anti-corrosion pump in one, overcomes the technical problems ... water, also can be used as a ordinary self-priming pump to avoid the rainwater on the land2,shell ... .1,Integrates the functions of submersible pump, ordinary self-priming pump on land and anti-corrosion pump in one, overcomes the technical problems ...