亚洲裸体视频,一级毛片在哪里看,国产素人在线,国产精品丝袜久久久,亚洲无砖砖区一二区免费,亚洲а∨天堂久久精品喷水,91网站在线播放

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.