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