英德
有道
百度
谷歌
图片
维基
百科
基准长度
[机] datum length
- 对以张力金属丝作为大长度直线运动导引基准的可行性进行了分析，给出了系统的工作原理。
Feasibility of a kind of guiding datum line of linear motion in large distance using strained wire is analyzed. The working principle of the system is presented. - 海图的基准比例尺是图上一个单位长度与其对应的球面上长度的之比，用分数表示。
The natural scale of a chart is the ratio of a length measured on the chart to a corresponding length measured on the surface of the Earth and is expressed as a fraction. - 通过对图像瞄准系统中的畸变分析，提出以激光长度测量值作为长度基准的成像系统在线自标定方法。
In this paper the distortion of image collimating system is analyzed, and then an on-line self-calibration method with double-frequency laser length measuring result as length datum is presented.
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