二次直纹曲面的统一方程及柱面和锥面的判定
Publisher: 国家哲学社会科学学术期刊数据库
E-ISSN: 2095-9249|32|3|5-7
ISSN: 2095-9249
Source: 萍乡学院学报, Vol.32, Iss.3, 2015-01, pp. : 5-7
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Abstract