透气钢性能与特性 透气钢 4CR13 ... 日加金属制品（上海）有限公司

p1Src=//y1.yzimgs.com/uploads/348454/2010101017312141.jpg&p2Src=//y3.yzimgs.com/uploads_old/348454/2011122410330904_old.jpg&p3Src=//y3.yzimgs.com/uploads_old/348454/2011112411580709_old.jpg"

aa