我的资料汇编

管壳式换热器设计图纸
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AutoCAD高级教程
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压焓图 制冷系统图
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热泵热水器瞬态特性研究
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cad经典教程
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phoshop电子书
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cad命令速查
http://co.163.com/forum/content/1783_719700_1.htm