Disclosed is freely varifocal glasses, which comprises zoom lenses and a focusingdevice.
自由变焦眼镜，是由可变焦镜片和调焦装置构成。
2
The report talks about the principles, structure, accuracy analyses, main technical data, characteristics, adjustment and application of a new type internal focusingdevice for centring.
本报告介绍了一种新型内调焦对心器的原理、结构、精度分析、主要技术参数、特点、仪器的调整及使用。
3
In this article, we analyze how device control works in both operating systems, examining everything from architecture to system calls and focusing on the differences.