英语俚语“signal 20”的翻译、释义、用法及例句-英语俚语辞典

俚语	signal 20
释义	Signal 20 Police code for someone who is mentally unstable. This one is a 20. So and so is a signal 20 Signal 20 Personnel status check on a Fire ground or other emergency scene. Command: " Unit 700 Signal 20". Unit 700: "Check".
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Signal 20