狠狠操2019|爱爱视频网址|欧美在线视频导航|www.xxxxx,欧美日本激情,tvb银狐电视剧粤语高清在线观看,好好生活免费观看完整版高清在线

　　Good news came from the site of Xingai steel recently. First trial production for φ6.0mm XGLB82A is successful at hard wire work shop of wire rod mill.

　　Rare factory in domestic can produce φ6.0mm because of remachining grooved roll and repeated debugging for rolling procedure as rolling groove with separate series. Collars of 5th production line and current process parts were used in this trial production and further discuss between technology department and workshop which optimized rolling procedure, guide system and groove system to guarantee production successfully.