单词	振铃切断继电器
释义	振铃切断继电器 ringing trip relay
随便看	planning concept planning conception planning conceptualization planning condition planning conditions planning conference planning considering uncertainty planning constrain planning construction Planning-construction Cooperation planning consultant Planning consultation planning content planning contents Planning control planning-control planning control and decision evaluation planningcontrolling system planning controlling system Planning Control Sheet planning cooperation planning coordination Planning Coordination Committee Planning Coordination Conference planning coordination group