词汇	无故障工作
释义	无故障工作 no-failure operation
随便看	push-button dial switch push button dial telephone push-button dial telephone pushbutton dial telephone set push button dial telephone set push-button dial telephone set push button dial type push-button door handle push buttondown push button down push button drill push-button drilling pushbutton electric starting push button entry push-button feeding push button flame ignitor push-button flight push button for bell push-button for calling extension push button for emergency call push button for fire alarm pushbutton formulaton push button formulaton push-button for selecting stations push-button for selecting wavebands