英语词汇“knock device”的翻译、意思、用法、释义-英汉汉英双解词典

词汇	knock device
释义	knock device 声音信号
随便看	arm service station arms expansion arms expansion and war preparation arms expansion and war preparations arms experts arms export Arms Export Control Board arms exporter arms-exporting country Armsey armseye arms factory arms-for-hostages arms forward arms forward lift arms forward with forearms inward arms forward with forearms upward arms front half downward arms front half sideward arms front half upward armsful arms fully extended overhead Arms gap worries NATO chief arm shaft Arm shaft