With the extensive application of the electro-optical range finders, the polar coordinate method is used as an easy, rapid and exact method for the curve survey of the high class highways.

随着光电测距仪的广泛使用，极坐标法已逐渐成为高等级公路曲线测设的一种简便、迅速、精确的方法。

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The principle and function of optical range finder are described.

介绍了光学测距器的功能和原理。

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A new method of route survey and design by electro-optical range finder was studied.

本文研究了利用光电测距仪进行道路勘测设计的新方法。

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The slim, super-stylish Cyber-shot WX300 camera is the world's smallest and lightest digital still camera that packs a powerful 20x optical zoom range.

ENGADGET: Sony brings Cyber-shot HX300, WX300 and TX30 to the US with fast autofocus

Exclusive to Sony, 'By Pixel Super Resolution' processing further extends the camera's 5x optical zoom range, allowing full-resolution 16.2 megapixel images with a maximum 10x zoom.

ENGADGET: Sony Cyber-shot TX55 packs 16.2-megapixel sensor, promises 'extremely low' noise in dim light

With its compact design and powerful 16x optical zoom, the PowerShot SX160 IS is a versatile camera with a dynamic optical zoom range from 28mm wide up to 448mm, perfect for everyday use.

ENGADGET: Canon announces PowerShot SX500 IS, SX160 IS superzoom cameras ahead of Photokina