于1982年援外工作期间,对毛里塔尼亚生活污水、砂壤土和蔬菜中污染的寄生虫卵进行了调查,方法如下: 一、污水池水的检查方法 先将混有居民粪尿污水池中的水搅混,用桶取20～50cm深处污水1000ml。用60目/时、80目/时、100目/时、120目/时和140目/时五个铜药筛(套叠) During the period of foreign aid work in 1982, the polluted parasite eggs in Mauritanian domestic sewage, sandy loam soil and vegetables were investigated. The methods are as follows: First, the inspection method of sewage pond water First, the water mixed with the residents’ With the bucket to take 20 ~ 50cm deep sewage 1000ml. Five copper sieves (nested) with 60 mesh / hour, 80 mesh / hour, 100 mesh / hour, 120 mesh / hour and 140 mesh /