This system is the homework part of "Civil Engineering Drafting" web site of South West Jiaotong Universit national level classic course in 2004.
该系统是2004年西南交通大学国家级精品课程“土木工程制图”网站的作业部分。
This system is the homework part of "Civil Engineering Drafting" web site of South West Jiaotong Universit national level classic course in 2004.
该系统是2004年西南交通大学国家级精品课程“土木工程制图”网站的作业部分。
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