本文分为三个主要部分：第一部分分析了多径对扩频测距系统接收机码跟踪的影响机理。
It consists of three main parts: in the first part, we analyse the effect of multipath on code-tracking loops of receivers in Spread-Spectrum Ranging Systems.
条烟综合检测机是针对卷烟高速包装机生产的条烟成品的外观质量、隐形字符码和缺包称重检测“三合一”的检测新设备。
The 3-in-1 Cigarette Carton Composite Inspector is a newly invented instrument, which performs the carton quality inspection, covert codes verification, and weight detection.
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