大满贯老品牌网站-大满贯dmg网站登录

您现在所在的位置:首页 >> 大满贯dmg网站登录

National Grid electricity load a new record

Current transformer primary side coil turns put little general is a wire, put a lot of turns on the secondary side, so from the principle of voltage transformers up analysis, if one senses a low voltage, then the secondary side as. .....[更多详情]

1

Copyright 2015 All Rights Reserved Technical support:Midian

Baidu
sogou