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上个世纪,杀虫双20多年杀虫历史为中国农民水稻杀虫保高产创造了辉煌。近年来,由于产品结构老化、更新缓慢,加上市场竞争日趋激
In the last century, the history of insecticidal double-double insects and insects has created brilliant splendid pests for peasants in China. In recent years, due to aging product structure, slow update, coupled with increasing market competition