freecad制图与建模入门到精通 工程制图绘图 autocad 三维建模辅助
freecad制图与建模入门到精通 工程制图绘图 autocad 三维建模辅助
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二,freecad:是一个开源的3d cad建模和设计工具,基于opencascade平台
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