Receivers must be as noise - free as possible.

接收机必须尽量做到无噪声.

辞典例句

To reduce pressure steadily and noise - free.

工作平稳,无噪声及冲击.

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Jacked pile has many good qualities such as noise free , vibration free and pollution - free.

静压桩具有噪音小 、 振动少、无污染等优点.

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