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发明名称
Procédé de construction métallique de galeries de mines, tunnels, puits et autres
摘要
申请公布号
FR801686(A)
申请公布日期
1936.08.13
申请号
FRD801686
申请日期
1936.01.29
申请人
发明人
EMIL SCHMIDTMANN,
分类号
E21D11/20
主分类号
E21D11/20
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代理人
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