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发明名称
SEGMENT TUNNELLING SHIELD
摘要
申请公布号
GB1245484(A)
申请公布日期
1971.09.08
申请号
GB19690058470
申请日期
1969.11.29
申请人
ARTHUR JAMES FLATMAN
发明人
ARTHUR JAMES FLATMAN
分类号
E21D9/06;E21D11/15
主分类号
E21D9/06
代理机构
代理人
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地址
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