中文字幕无码免费人妻,日韩亚洲欧洲一区二区三区,欧美激情网页一区三区,丰满少妇被猛男猛烈进入久久

roller blank
發(fā)布時(shí)間:2024-06-05 13:44:26

Brand products —— roller blank

Jianlong Beiman is the first enterprise to produce cold rolled working roller blanks in China. Since the early 1980s, 86CrMoV7 with 1.7 meters of cold-rolled working roller blank has been successfully trial-produced for WISCO and won the National Gold Award. High-quality alloy steel cold rolled roller steel has become one of the leading products of Jianlong Beiman. Several products such as Cr2%、Cr3%、Cr5%、Cr6%、semi-high speed steel series roller steel have been developed to fill the domestic blank, and the national standard of "GB/T 15547-2012 forged steel cold roll blanks" has been revised.

A new type of roll blank, such as "nitrogen alloyed cold rolling roller" and "high wear resistance Cr8 cold rolling roller ", has been successfully developed in recent years, which has made a great breakthrough in the wear resistance, accident resistance and service life of cold rolled working rollers. It realizes the serialization and quality production of cold rolled roller blank, and leads the upgrading of materials in the field of cold rolled roller in China.

Product specifications

Cold rolled roll billet :≤Φ650mm

Hot rolled roll blank, support roll blank :≤Φ1200mm



国产亚洲视频中文字幕97精品| 久草视频在线视频在线视频在线观看| 亚洲精品成人在线播放| 91久久久精品人妻| 蜜臀99久久精品久久久| 亚洲影视一区二区三区| 国产婷婷av一区二区| 日本一区二区三区免费的视频| 国产精品日韩主播无套| 日韩一区二区三区视频| 午夜精品人妻一区二区三区| 伊人精品久久久久7777| 2018在线不卡爱视频| 日韩在线|中文字幕| 国产精品秘久久久久久| 成人亚洲精品一区二区| 神马午夜久久久久久| 99亚洲视频一区二区| 丁香六月婷婷综合缴情欧美| 久久精品成人免费国产| 色婷婷亚洲蜜桃久久| 国产白嫩精品久久久| 日本免费一区二区在线观看| 韩国爱情电影年轻的母亲| 日本成人免费一区二区三区| 国产日韩欧美久久综合网| 日本一区二区三区人妻视频| 国产精品亚洲А∨天堂网不卡| 国产黄色三级三级三级看三级| 2021国产三级精品三级在专区| 国产精品人成在线观看不卡| 亚洲AV手机在线观看| 国产日韩欧美中文字幕在线| 日韩在线观看一卡二卡| 国产精品久久小视频| 日韩在线中文字幕观看| 精品国产污免费网站入口| 中文字幕熟女一区二区三区| 国产99青草视频在线播放视| 在线十亚洲十欧美十日本专区| 无码无套少妇毛多69XXX|