Graphic symbols for weighing instruments 天平制造中的图示符号
Digitized cadastral map is drawn with drawing instruments after data′s collection with electronic theometer and electronic automatic recording in the field and editing graphic indoors.
数字化地籍图是用电子速测仪和电子手簿自动记录器在野外采集数据，在内业进行图形编辑，然后用绘图仪绘制成的地籍图。
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