用一张纸或聚酯薄膜霞盖在平板仪上，可在制图时作诠释。
A sheet of paper or mylar covering the plane table is annotated during map construction.
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扫描仪复制图片或文件到计算机中。
A scanner copies a picture or document into the computer.
应用推荐
模块上移
模块下移
不移动