protractor

protractor

[prəˈtræktə(r)]

n.量角器，分度规;

复数： protractors

例句:

1、

an easy way to accurate measurement of inside and outside cone with sine protractor

在正弦规上测量内外圆锥体的精确简便方法

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2、

method to measure inner cone angle with sine protractor

用正弦规测量内锥角的方法

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3、

the actual displacement between any two points may be determined by drawing a scale diagram with a ruler and a protractor, or by using simple trigonometry.

任何两点之间实际的位移可用比例尺和分度器画简图予以判断，或者使用简单的三角学计算之。

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