... 1) small pumping station, construction of simple structure, investment was greatly reduced, saving about 40% of project cost; 2) Pump integration, ... for the user; 4) can be remote monitoring, management convenience, cost little. 2, high reliability, high security 1) the double ... for the user; 4) can be remote monitoring, management convenience, cost little. 2, high reliability, high security 1) the ...