“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	polyvinyl methyl ether polyvinyl pyrrolidone polyvinyl resin Polyzoa polzenite pomace Pomacentridae Pomadasyidae Pomatiasidae Pomatomidae pomegranate Pomeranchuk cooling Pomeranchuk pole Pomeranchuk theorem Pomeron Pompe disease Pompilidae Pompiloidea pom-pom PONA analysis poncelet Ponchon-Savarit method pond pondage pondage land

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