The article analyses the frequency security & stability of signal generator circuit of dispatching equipment of automatic block with frequency shift, and an optimum design scheme is concluded.

本文对移频自动闭塞发送设备信息源电路的频率安全性及稳定性进行了分析，并总结出最佳设计方案。

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On April 21st, Admiral Allen tells us the government started dispatching equipment rapidly to the Gulf, and you just said on day one you recognized the enormity of this situation.

WHITEHOUSE: Deepwater BP Oil Spill: Presidential Press Conference