久久久久久国产一区二区三区,天天狠天天操,国产乱码久久久久久一区二区,黄色短视频免费观看,日日噜噜夜夜爽狠狠视频 ,午夜激情啪啪,不卡的av电影在线

Casus Products>> Casus

  The QS35C-C produced by XINGTAI STEEL has the advantages of stable composition, low harmful elements and few surface defects. This material is a special material for shaft and rod products. A customer used this material to make automobile piston rod. The customer reflected that the quality of our QS35C-C material is stable, and it has good surface quality and cutting performance, which meets the use requirements of the final product.