香蕉西瓜草莓茄子视频APP-国产精品亚洲欧美大片在线看-日本潘金莲三级bd高清-中文字日产幕码三区的做法大全

Main Products
Products Grade: 42Cr9Si2,45Cr9Si3,40Cr10Si2Mo
Specifications: φ5.5-φ16mm
Applied Standard:  agreement
Characteristics: Engine Valve
Applications: high-end parts
Use of Products: Engine Valve steel with high strength, high temperature resistance, used in the production of engine intake and exhaust valves and other high temperature resistant parts.