... Pump is easy to operate, reliable, portable with low noise, highly efficient and much durable. ... no leakage position;d. Wearable material, innocuity, with power applicability to other material, no rustily and empoison ... , such as food, medicine.e. Diverter valve with special structure, flexible running, no dead center, ... not. Do not need special person to watch, it is easy to operate without danger; ...