This is called a planimeter. And what it does is it measures areas.
它叫测面器，它能够测量面积。
The surface ratio of conus to disc was calculated using a planimeter.
我们使用面积计测量圆锥与视神经盘表面比值。
This paper presents an universal formula of assign m in the digital planimeter.
提出一个数字求积仪安置值m的通用公式。
Graph paper, parallel, and planimeter methods are current tools for acreage calculation.
目前常用的量算面积方法有方格纸法、平行线法、求积仪法。
In traditional reservoir capacity calculation, a planimeter is used to obtain a reservoir capacity from topographic maps and large scale topographic maps are needed if high accuracy is required.
传统的库容计算方法是在已有的地形图上采用求积仪法进行，当精度要求较高时，需到现场实测更大比例尺的地形图。
In traditional reservoir capacity calculation, a planimeter is used to obtain a reservoir capacity from topographic maps and large scale topographic maps are needed if high accuracy is required.
传统的库容计算方法是在已有的地形图上采用求积仪法进行，当精度要求较高时，需到现场实测更大比例尺的地形图。
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