Keep files, drawing and measuring instrument.
保存文件，图纸和测量仪器。
The instrument to draw hyperbola has great significance for teaching and engineering drawing.
绘制双曲线的仪器在教学及工程绘图方面具有实际意义。
In charge of drawing out the annual maintenance plan of the instrument and equipment and put it into practice.
负责编制仪器设备年度维护保养计划并组织实施；
The histogram printed on the drawing instrument.
用数控绘图仪绘制直方图。
The histogram printed on the drawing instrument.
用数控绘图仪绘制直方图。
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