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1986年11月,山西省科委组织果树考察团赴美考察,一行4人,先后访问了美国农业部贝尔茨维尔农业研究中心(Beltsville)、美国农业部太平洋沿岸地区农业研究中心(Fresno)、美国国家核果类果树种质资源库(Davis)、康奈尔大学
In November 1986, Shanxi Provincial Science and Technology Commission organized a study tour of fruit trees to visit the United States with a delegation of four people. They visited Beltsville, Department of Agriculture of the United States Department of Agriculture, Fresno Pacific Rim Research Center of the United States Department of Agriculture, National Tree Fruit Germplasm Bank (Davis), Cornell University