“隧道工程”课程中围岩分级的教学难点及对策分析

Publisher: 国家哲学社会科学学术期刊数据库

E-ISSN: 1006-9372|volume|1|76-78

ISSN: 1006-9372

Source: 中国地质教育, Vol.volume, Iss.1, 2016-01, pp. : 76-78

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Abstract