两男一女60分钟视频_日韩精品国产一区二区三区_丰满的女教师bd高清_一本道av天堂无码免费_十八禁av无码免费网站

Power frequency cored copper melting fumace is mainly used for melting and heat preservation of copper and copper alllys. Energy saving and power saving , effectively reducing production costs. Stable operation and long service life. Reasonable structure and simple operation. Cooperating with the casting machine can realize the uninterrupted work of continuous copper melting and continuous casting.