APPARATUS FOR MEASURING THE DIFFERENCE IN PHASE BETWEEN TWO SIGNALS OF THE SAME FREQUENCY, ONE HAVING NOISE ASSOCIATED THEREWITH

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  机译： 用于测量多相输电线路中的弱噪声频率信号的方法和设备

• 4. PROCESS AND APPARATUS FOR MEASURING WEAK NOISE FREQUENCY SIGNALS IN A POLYPHASE POWER TRANSMISSION LINE [P] . 德国专利： DE3460070D1 . 1986-05-15

  机译： 多相输电线路中微弱频率信号的测量方法及装置

• 5. Process and apparatus for measuring weak noise frequency signals in a polyphase power transmission line [P] . 欧洲知识产权局专利： EP0117421A1 . 1984-09-05

  机译： 用于测量多相输电线路中的弱噪声频率信号的方法和设备

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