国家用于人民防空通信的专用频率和防空警报音响信号，任何组织或者个人不得占用、混同。

No organizations or individuals may use the same frequency or the same acoustic signals as those specially used by the State for civil air defense communications or air defense warning.

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她也负责记录你的作战数据。要记录时只需发送信息到记录专用的频率——140.96就行了。

Tom: She's also in charge of recording your mission data. Whenever you want to SAVE, SEND a message over the reserved SAVE frequency, 140.96.

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根据外套壁厚和裂纹位置特点，提出了专用超声换能器的设计关键在于工作频率和晶片倾斜角。

It was pointed out that the keypoint in designing the special transducer was its working frequency and crystal Angle according to the coat thickness and flaw location.

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