中国风能技术发明专利维持时间影响因素研究

Publisher: 国家哲学社会科学学术期刊数据库

E-ISSN: 1000-2995|36|10|139-145

ISSN: 1000-2995

Source: 科研管理, Vol.36, Iss.10, 2015-01, pp. : 139-145

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Abstract