视频 欧美 国产_日韩欧美自拍另类_亚洲少妇无套内射激情视频_男女黄色网站免费观看_一区二区成人av_日本黄色录像一级片_国内精品三级电影_少妇三级高清自拍_免费国产黄在线播放_丰满少妇人妻HD高清大乳

Finishing mill roll box maintenance

2023-06-21

The roller box belongs to the closed reducer mechanism, which has strict maintenance requirements, especially higher requirements for sealing oil, dustproof and waterproof. The roller box has 3 shafts as the focus of sealing, and ...

Discussion on production technology and common quality problems of hot rolled strip steel

2023-06-05

Abstract: The main quality indexes of hot rolled strip steel products include surface quality, shape and dimensional accuracy, mechanical properties and so on. With the wide application of automatic control technology in hot ro...

Solutions to common problems in aluminum rolling process

2023-05-18

The quality control technology in aluminum rolling process is very important to the current production enterprises. We now use the raw material rolling technology is to follow the mid-1970s Shanghai aluminum factory taught down...

Panzhihua Steel City Group is fined 500,000 yuan!

2023-05-18

At about 1410 hours on October 8,2022, an object strike accident occurred at the branch of Tiexia branch of Panzhihua Steel City Group Co. , Ltd. , killing one person, the accident caused a direct economic loss of about 2032200...

High speed wire mill roll selection

2023-05-05

I. Introduction   In the middle of the 20th century, due to the war and post-war reconstruction, industrial countries needed a large amount of wire, which promoted the rapid development of wire mill. In the 1960s, ...

Research on Cold Rolling Equipment Management and Maintenance (2)

2023-04-10

3. Guarantee measures for cold rolling equipment management and maintenance   In the continuous development of automation and intelligence today, cold rolling equipment has gradually added more electronic component...