The X80 pipeline steel with higher strength has been developed since Baosteel finished developing its X70 pipeline steel used in the West-East natural gas transmission project.
宝钢在完成“西气东输”工程用X70管线钢后，进行了更高强度级别X80管线钢的研制。
The X80 pipeline steel with higher strength has been developed since Baosteel finished developing its X70 pipeline steel used in the West-East natural gas transmission project.
宝钢在完成“西气东输”工程用X70管线钢后，进行了更高强度级别X80管线钢的研制。
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