论文部分内容阅读
各位常务理事:兹定于2008年11月4~8日在北京举办“第七届全国绿色环保肥料(农药)新技术、新产品交流会”期间,召开中国腐植酸工业协会第四届第五
Members executive director: hereby set to be held in Beijing on November 4-8, 2008 “The Seventh National Green Fertilizer (pesticide) new technology and new product exchange meeting,” held the China Humic Acid Industry Association, the fourth fifth