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发明名称
IMPROVEMENTS RELATING TO THE LAYING OF UNDERGROUND PIPES
摘要
申请公布号
GB9103312(D0)
申请公布日期
1991.04.03
申请号
GB19910003312
申请日期
1991.02.16
申请人
THOMSON, JAMES
发明人
分类号
主分类号
代理机构
代理人
主权项
地址
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