The emerging of virtual laboratory solves the problems of time, location and apparatus limits, and it provides a self experiment platform for users.

虚拟教学实验室的出现，很好地解决了传统实验受时间、地点、设备制约的现状，为用户提供了一个自主实验的平台。

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The invention provides a recording apparatus capable of improving the precision of recording location in simple structure.

本发明提供一种能够以简单的结构提高记录位置精度的记录装置。

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Utilizing the characteristics of laser, by means of theoretical analyzing, a tentative scheme of the laser wheel location apparatus is presented.

利用激光的特点，根据理论分析，提出了激光车轮定位仪的设想。

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