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发明名称
Dispositif pour l'étayement des soutènements métalliques des galeries de mine de type quelconque
摘要
申请公布号
FR998131(A)
申请公布日期
1952.01.15
申请号
FRD998131
申请日期
1949.10.22
申请人
HEINR. FU:RST SOHNE
发明人
分类号
E21D11/28
主分类号
E21D11/28
代理机构
代理人
主权项
地址
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