色戒时长完整版,亚洲国产一区二区三区精品,久久久久久久精彩视频,怡红院av亚洲一区二区三区h,艳情五月,国产亚洲成av人在线观看导航,男女午夜免费视频

Main Products
Products Grade: 1215
Specifications: φ5.5~26mm
Applied Standard:  agreement
Characteristics: The products are mainly used to produce the shafts for printer,fax machine and so on.
Applications: Free-cutting carbon steel
Use of Products: The grade 1215 is belong to free cutting steel of low carbon and high sulfur.The products have good forms in inclusions by rational controling the chemical contents and oxygen content.The products have good cutting and machining capability.