At the power output, OCL complementally and symmetrical power amplifier is adapted. The output sine voltage becomes smooth and stable by adding voltage-negative-feedback to power amplifier.

在功率输出级采用OCL互补对称功率放大电路，并对该功放电路增加电压负反馈，使得输出的正弦电压信号平滑而稳定。

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Dual-piston driven. toothed bar and gear driven, structure is compact, position of assembly is symmetrical. Motion is swift. turning of output axis can be changed through simple reversal of piston.

双活塞推动，齿条齿轮传动，结构紧凑，装配位置对称，动作迅速，通过简单的活塞颠倒可以改变输出轴转向。

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The experiments on the effects of LB_HUST show that, LB_HUST can be used as a compacted and symmetrical DTW lower bounding function, and has a better output in the time series clustering.

实验结果表明，LB_HUST不仅是时间序列基于DTW计算的一种紧密而对称的下界函数，而且在时间序列聚类中能够取得较好效果。

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That means that not only the signal input into the amplifier is symmetrical but also the signal output and therefore the connection to the headphones.

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