self-holding push button

自保持按钮,self... ... ) hold bottom button 保留按钮 ) self-holding push button 自保持按钮 ) hold button 保持按钮 ...

"信号强度计... ... "self-holding contact " 自持触点" "self-holding push button " 自持按钮" "self-hunting " 自动寻线" ...