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20％病毒A是黑龙江省齐齐哈尔市北方化工研究所研制出的一种新型的治疗病毒病的化学农药。作者用300倍液、400倍液和500倍液试验,每七天喷一次,共
20% of virus A is a new type of chemical pesticide to treat virus disease developed by North Chemical Industry Institute of Qiqihar in Heilongjiang Province. The author used 300 times liquid, 400 times liquid and 500 times liquid test, once every seven days, total