1,no need to change the screen ,but washing the screen online 2, the filtering screencan be used more than 100 times Specification 1, Filtering area from 365 cm2 to 10000 cm2, initiative internationally (international patent)2, No need to change the screen, but backflush of rapid pulse by little clean material in the machine3,Cleaning area of the filtering screen up to 80%-95%4,No interrupt the ...