turnon反義詞是什麼

！turn on反義詞是turn off，turn off中文意思是關掉，關閉拐彎，使轉變方向使失去興趣

Its main return circuit adopts thyristor contactless switch， so can turn off circuit quickly， precisely and reliably.該系列點焊機主迴路均採用閘流體無觸點開關，電路關斷時間快、準確、可靠。