英语词汇off-hook signal是什么意思，off-hook signal的用法、释义、翻译、读音、例句、短语词组-英汉汉英翻译词典

单词	off-hook signal
释义	off-hook signal　【计】摘机信号
随便看	thread tool(chaser) thread vein thread waste thread worm thread(ed) gauge thread-needle threadbare threadbare threadbare threadbare threaded threaded threaded threaded threaded adapter threaded bend threaded bolt threaded bolt threaded connection threaded core threaded end threaded felt threaded file threaded fit threaded fittings

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