The piston slides noiselessly up and down.
这个下动,没有响声。
The piston slides noiselessly up and down.
这个下动,没有响声。
The traditional transformer is trending towards pocketsize and noiselessly in inverter using high-frequency link technique,but the control circuit becomes difficult to be designed.
高频链技术使逆变器中变压器趋向于型、无噪声化,但增加了控制电路设计难度。
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