中文说明:2012年全国夏令营D题:打孔机生产效能的提高
English Description:
2012 National Summer Camp question D: improvement of production efficiency of punching machine2012 National Summer Camp question D: improvement of production efficiency of punching machine
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中文说明:2012年全国夏令营D题:打孔机生产效能的提高
English Description:
2012 National Summer Camp question D: improvement of production efficiency of punching machine夏令营D题.zip