成人免费a视频,李雅在线观看一区国产,五月婷婷狠狠,精品国产自在2o18,狼伊人,五月天丁香婷婷网,久久亚洲精品无码观看不卡

Casus Products>> Casus

  The GSWRCH35K-W produced by Xingtai Steel can meet the requirements of customers for widmanstatten structure, the steel by changing the controlled cooling technology to achieve the goal of reducing widmanstatten structure. A customer of Xingtai Steel uses this steel to produce 8.8 grade fasteners. The customer reflects that the product has stable chemical composition, uniform organization and good cold heading performance, which can meet the requirements of customers.