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Reverse flushing can be done automatically: the backwash is done by hydraulic valve opening and hydraulic cylinder pistons, which are controlled by the backwash controller. The anti-flushing controller can accurately control the hydraulic valve and hydraulic cylinder according to the differential pressure value from the filter inlet and outlet, and the power of the controller comes from the pressure of the line itself.
If the child appears cold, the symptom is not serious, had better be in the home nurse, observe, do not take the child to the hospital easily, the personnel in the hospital is much, the bacterium is much, very easy appear cross infection. Also don't worry about the cold into pneumonia, pneumonia is a serious respiratory tract infection, systemic symptom must be heavier, and the child mental state is poor, and a cold there is obvious difference, don't ailment rectification.
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