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发明名称
Improvements in and relating to the construction of tunnels and the like
摘要
申请公布号
GB560849(A)
申请公布日期
1944.04.24
申请号
GB19420014586
申请日期
1942.10.19
申请人
WILLIAM WRIGHT
发明人
分类号
E21D11/15
主分类号
E21D11/15
代理机构
代理人
主权项
地址
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