久久呻吟视频,亚洲精品黄片,艹碰国产,麻豆视频一边做一边爱的一级视频,视频区图片区小说区,亚洲免费少妇,亚洲日韩黄色网站,精彩日韩亚洲对白在线播放,国产又粗又猛又爽又黄的链接,亚洲无线中文字幕无码

High voltage contacts in mining areas, high-voltage AC vacuum contactor is a common electrical switches, mainly used as frequently or breaking the AC main circuit and can be remotely controlled, the main control object is a motor or transformer.

Low capacity contactors can also be applied capacitive load circuit. DC magnetic vacuum contactor coil system operations into a single dual-diameter winding and winding diameter.