“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	hydrogen ion hydrogen ion concentration hydrogen ion exponent hydrogen laser hydrogen line hydrogen loss hydrogen maser hydrogenolysis hydrogenous hydrogen overvoltage hydrogen oxide hydrogen peroxide hydrogen phosphide hydrogen-reduced powder hydrogen selenide hydrogen star hydrogen sulfide hydrogen tellurate hydrogen thyratron hydrogeochemistry hydrogeology hydrograph hydrographic basin hydrographic chart hydrographic cruise

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