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  • arpanmechengg

    arpanmechengg

    @arpanmechengg-nrfwlX Nov 5, 2008

    its work base on the pressure differance at deep level inside ground and output at some define level as ur desire and its all pipes must full with water otherwise its can't work and not get out put water at desire place its effect call "priming" of pump so its neccessary that's principal of vacume pump