... ,Integrates the functions of submersible pump, ordinary self-priming pump on land and anti-corrosion pump ... to protect the motor;4,super-hard alloy seal, has longer lifetime;5,special structure design, ... 1,Integrates the functions of submersible pump, ordinary self-priming pump on land and anti-corrosion pump ... to protect the motor;4,super-hard alloy seal, has longer lifetime;5,special structure design, ...