English
全部
搜索
图片
视频
地图
资讯
更多
购物
航班
旅游
笔记本
Top stories
Sports
U.S.
Local
World
Science
Technology
Entertainment
Business
More
Politics
时间不限
过去 1 小时
过去 24 小时
过去 7 天
过去 30 天
最佳匹配
最新
电子工程专辑
2 年
划重点!什么是隔离变压器?原理和作用是什么?
隔离变压器(Isolation transformer)是指输入绕组与输出绕组带电气隔离的变压器,隔离变压器用以避免偶然同时触及带电体,变压器的隔离是隔离原副边绕线圈各自的电流。早期为欧洲国家用在电力行业,广泛用于电子工业或工矿企业、机床和机械设备中 ...
当前正在显示可能无法访问的结果。
隐藏无法访问的结果
今日热点
‘Sanford and Son’ star dies
'Regrets' emails w/ Maxwell
Actor found guilty
Signs 'ICE on notice' order
Louisiana parade shooting
Judge rejects Minnesota bid
US envoy arrives in Caracas
Cavaliers coach fined $50K
Judge orders release
'Home Alone' actress dies
Breaks NBA record
Majority of stores to close
Orders IndyCar race in DC
Reveals pick to lead BLS
Alcaraz wins Australian Open
Ukraine hit by blackouts
Bus crash in Turkey
ISR strikes kill 30 in Gaza
Wins TX special election
UKR talks set for next week
How to watch Grammys
Partial govt. shutdown
Former Stanford coach dies
Undergoes UCL surgery
Mine collapses in Congo
US approves arms sales
Agree to $70M, 7-year deal
8 inmates recaptured
Anti-ICE protests in Milan
Steelers hire Graham
Retires after 17 seasons
Venezuela plans amnesty law
NASCAR Clash postponed
George suspended 25 games
反馈