日韩午夜精品视频,欧美私密网站,国产一区二区三区四区,国产主播一区二区三区四区

These normal looking sockets have a special function. They automatically cut the amount of power used by electrical appliances set to stand-by. In homes and office buildings, huge amounts of electricity are consumed each year by electric devices on stand-by. [China.org.cn]