对静态位移的测量，二极管检波或乘法检波后分别得到的是一含多频或单频交流成分的脉动直流信号，而乘除法检波后信号不含交流成分。
The DC signals after demodulation still contain AC component of one or several frequencies respectively for multiplication or diode methods, but no AC component for multiplication-Division one.
通过对废弃电路板破碎解离及解离后有价成分的分析，采用脉动气流分选装置对电子废弃物中有价成分的回收进行了研究，并取得了初步进展。
After analyzing the valuable components of the waste printed circuit boards, a development on research of recycling the valuable components of electronic waste using pulsing air classifiers was made.
通过对废弃电路板破碎解离及解离后有价成分的分析，采用脉动气流分选装置对电子废弃物中有价成分的回收进行了研究，并取得了初步进展。
After analyzing the valuable components of the waste printed circuit boards, a development on research of recycling the valuable components of electronic waste using pulsing air classifiers was made.
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