Evaluation of the use of this paper collected 837 counties (cities) in the effective datacompleted 2001-2002 counties (cities) of scientific and technological progress trend analysis.
On the aspect of hardware, they include: narrow pulse and high frequency ultrasonic sensor's design, high frequency signal generator and receiver's design, high speed datacompleted sampling's design.
因此本文还详细阐述以下内容：硬件方面采用了高频窄脉冲信号发生及接收放大电路、高速数据采集电路；
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According to data released in January 2017, 56 percent of bills are paid online, which means that just under half of payments still rely on delivery services to be completed.