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 QS45C-C is a dedicated material for shaft and rod, which is mainly used to produce piston rod of automobile shock absorber, Engine gear ring and other products. The piston rod customer reflected that our QS45C-C has stable composition, uniform organization, low inclusion content, good surface and cutting performance, and meets the requirements of the final product.