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发明名称
TUNNEL UNIT
摘要
申请公布号
GB9119146(D0)
申请公布日期
1991.10.23
申请号
GB19910019146
申请日期
1991.09.06
申请人
LEWIS MARTIN P.
发明人
分类号
E01B19/00;E02D29/05
主分类号
E01B19/00
代理机构
代理人
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