辨别引起系统质量特性波动的噪声因子。
Identify noise factors whose variation may affect the quality characteristics.
在电子技术中，把交流电转换成低电压直流电的一种电路。这种电路的输出是经过调整的，使它的噪声及电压波动都很。
In electronics, a circuit for converting AC voltage to low voltage DC in such a way that the output is regulated to minimize noise and voltage fluctuation.
采用由高低压力保护的压缩机组，具有自我监测的压缩机起闭控制程序，噪声小，寿命长，温度波动小。
With both high pressure and low pressure protection and compressor, self-checking compressor on and off controlling program, ensuring low noise, long duration and little temperature fluctuation.
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