本文从理论上分析闭端管路系统发生谐振的条件，并给出了实例分析。
The condition of resonance oscillation for pipe-one-end-closed system was analyzed on theory, and an example was gived to analyze it.
在常闭位置，电容器的一端被连接到电路lo。
In the normally closed position, one end of the capacitor is connected to circuit lo.
将其测试结果与模拟试验结果进行了比较，为闭式循环4.4K制冷机的第一级主换热器的热端温差的合理选取提供了依据。
The basis for selecting the reasonable temperature difference at the hot end of the first main heat exchanger of close-cycle 4.4K refrigerator is provided.
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