松辽学子献身房山三十年周忠旺北京市房山区林业局高级农艺师、副局长张明德１９６３年毕业于北京农业大学果树专业，分配到房山从事果树科技工作。３０年的生涯，他默默地奉献着自己的青春和年华。７０年代初，为探索果树生产中的问题，曾向单位领导申请，要求到农村深入... Song Liao students dedicated Fangshan thirty years ZHOU Zhong Wang Beijing Fangshan District Forestry Bureau senior agronomist, deputy director Zhang Mingde graduated from Beijing Agricultural University in 1963 fruit professional, assigned to Fangshan engaged in fruit science and technology work. 30 years of life, he quietly devoted his own youth and years. In the early 1970s, in order to explore the problems in the production of fruit trees, they applied to the leaders of the units and demanded that they should go deep into the rural areas ...