英语翻译
The best system would have two intakes,one floating intake for potable uses and one stationary intake lower in the tank to allow the mixing water to be used for nonpotable uses.The best overflow would be one that would allow water to exit from the anaerobic zone in the tank.Even better would be an overflow that would vacuum or
suction out the sludge that may accumulate in the bottom of a tank or cistern.