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发明名称
PIPELINE CONSTRUCTION
摘要
申请公布号
GB8418554(D0)
申请公布日期
1984.08.22
申请号
GB19840018554
申请日期
1984.07.20
申请人
WELDING INST
发明人
分类号
主分类号
代理机构
代理人
主权项
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