本文介绍了一种背投影式的运动技术影片分析系统。概述了该系统的设计原理、组成和特点。
A back projection system used for film analysis of sports techniques was introduced in this paper with descriptions of its design principle, structure, and characteristics.
将大型触摸屏、投影仪和扬声器系统合在一个便携包中，获得完整的交互式白板功能。
Get complete interactive whiteboard functionality in a convenient package that integrates a large touch screen, projector and speaker system.
它生产如平板电脑，数字相框，甚至便携式投影机之类的小配件。
It produces gadgets such as tablet computers, digital photo frames and even portable projectors.
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