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2007年4月14日,山东省高青县强的纳米科技推广直传大会隆重召开,来自全县的农牧业技术推广人员、农牧业科技带头人及用户代表共计80余人参
April 14, 2007, Shandong Province, Gao Qingxian strong nano-technology promotion conference was held grandly, from the county’s agricultural extension workers, agricultural science and technology leaders and user representatives a total of more than 80 ginseng