吉林省海龙县鱼种站在毛主席革命路线指引下,建立了“三结合”的科学实验小组,集中群众的智慧,于一九七○年试验成功家鱼简易孵化环道,又经一九七一年的进一步改进,在生产中取得了良好效果,其平均下塘率为45.1％:最高 Under the guidance of Chairman Mao’s revolutionary line, the Hailong County fingerling station in Jilin Province set up a “three-in-one” scientific experimental group that focused on the wisdom of the masses and successfully piloted the simple hatching of domestic fish in 1970. Further improvements in 1978 have yielded good results in production, with an average pond rate of 45.1%: the highest