国产一级精品成人久久av无码免费,日韩在线看片中文字幕不卡,中文字幕在线激情日韩一区,日韩欧美成人免费中文字幕,国产精品一区二区免费看,日韩欧美一区二区三区在线视频,中文字幕在线免费视频,中文字幕精品视频在线观看,国产日韩不卡免费精品视频,日韩中文字幕电影在线观看,91精品乱码一区二区三区熟女精品,亚洲欧洲在线观看精品,日韩中文字幕福利电影

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.