“drop relay”的概念、定义、翻译、参考文献-科学参考

单词	drop relay
释义	drop relay [¦dräp `rē´lā] ^ELECTRICITY Relay activated by incoming ringing current to call an operator's attention to a subscriber's line.
随便看	toroidal coordinate system toroidal core toroidal discharge toroidal lens toroidal magnetic circuit toroidal surface toromatic transmission torose torose load cast Torpedinidae torpedo torpedo air flask torpedo boat torpedo defense net torpedo exercise head torpedo exploder mechanism torpedo warhead extension torpor torque torque amplifier torque arm torque-coil magnetometer torque constant torque converter torque-load characteristic

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