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

Casus Products>> Casus

  The 42CrMoA in xingtai steel production has higher fatigue limit and multiple impact resistance after treatment, generally used in the production of 10.9 and 12.9 high-strength fasteners. Xingang`s  customer using the steel production is used for high-speed locomotive double connecting rod, the customer reflect the material strength, heat resistance, low temperature impact toughness has good performance, well received by customers.