It can tie a tripod, fixed on the display field.
可配合三脚架，固定于展示场。
A flat drawing board mounted on a tripod used in combination with an alidade to construct topographic or geologic maps in the field.
一块安装在一个三脚架上的平坦画板，与照准仪一起用于在野外测制地形图或地质图。
A flat drawing board mounted on a tripod used in combination with an alidade to construct topographic or geologic maps in the field.
一块安装在一个三脚架上的平坦画板，与照准仪一起用于在野外测制地形图或地质图。
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