目前正值肠胃系统传染病发病季节,饮水消毒工作乃是预防肠胃传染病的主要措施之一。过去水井漂白粉消毒工作中测量井水时,由于方法关系往往加在水里的漂白粉剂量不准确,所以又必须再慢慢试加漂白粉或等待一个时期再用,这样很不方便。并且在量井的方法上也存在着缺点,都是量井口的直径。但农村的水井绝大部分不是上下一般大的,而是井口小井底大,成为一个截头圆 At present, the incidence of infectious diseases of the gastrointestinal system season, drinking water disinfection work is one of the main measures to prevent gastrointestinal diseases. In the past, well water bleaching powder disinfection work well water measurement, because the method is often added to the water bleaching powder inaccurate dose, so they must then slowly add bleach or wait for a period of reuse, this is very inconvenient. And there are some shortcomings in the method of measuring the well, which are the diameter of the wellhead. However, the vast majority of rural water wells are not up and down the general big, but the bottom of a small wellhead, a truncated round