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发明名称
Lining for tunnels, shafts, and the like
摘要
申请公布号
US1779275(A)
申请公布日期
1930.10.21
申请号
US19270231431
申请日期
1927.11.07
申请人
HARVEY HUMPHRYES JAMES
发明人
HUMPHRYES JAMES HARVEY
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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