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Q/SY GDJ 0330-2011 埋地钢质管道热缩压敏带补口防腐层技术标准附件大小:6.23MB附件格式:1个直链文件,格式为pdf 资源简介:Q/SY GDJ中国石油天然气管道局企业标准Q/SY GDJ0330-2011埋地钢质管道热缩压敏带补口防腐层技术标准Technical standard of field-joint coating b