The reasonable establishment and use of drawing base can not only save more time, but also save the disk space and enhance the system speed to the CAD system.
合理地建立和使用图形库，不仅可以节约大量的绘图时间，而且对CAD系统来说，也可以节约大量磁盘空间，提高系统速度。
The reasonable establishment and use of drawing base can not only save more time, but also save the disk space and enhance the system speed to the CAD system.
合理地建立和使用图形库，不仅可以节约大量的绘图时间，而且对CAD系统来说，也可以节约大量磁盘空间，提高系统速度。
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