电键 meaning in Chinese

keyset; key; manipulator; telegraph key; key button

It is this release of energy that maintains the arc often seen when a switch is opened in an inductive circuit .
在电感电路中，打开电键时，就有这种能量释放，引起经常所见的电弧。
Key for morse code light
莫氏灯电键
Call circuit key
呼叫电路电键
" all information , from train schedules to discount - price goods , will be as close as the press of a key .
"所有信息,从火车时刻表到折价商品,只需按按电键就能得到。