久爱伊人,亚洲天堂aaa,欧美三级电影网站,国内一级黄色毛片,aaa毛片在线观看,青青福利,在线中文天堂

Xingtai Steel 35VB belongs to the high strength alloy structural steel, with the advantages ofstable composition, low harmful element, high steel purity, small decarburization layer, less surface defects, etc.While it has high strength, high impact toughness, high fatigue strength and high strength of the gap and good Cutting and welding. It is usually used in hot rolled annealed conditions, for producing high strength of connecting rod, bolts, etc.