一种用于钢管连轧机上生产中q355b合金钢管的管坯

　　JISHULINGYU

　　BENSHIYONGXINXINGSHEJIYIZHONGZHIZAOq355bHEJINGANGGUANDEGUANPI，YOUQISHEJIZHIZAOZHONGDAKOUJING、ZHONGHOUBI、HEJINGANGGAODUANq355bHEJINGANGGUANDEGUANPI。

　　BEIJINGJISHU

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