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发明名称
Perfectionnements apportés aux dispositifs de soutènement, plus spécialement à ceux des galeries de mines
摘要
申请公布号
FR1113320(A)
申请公布日期
1956.03.28
申请号
FRD1113320
申请日期
1954.09.13
申请人
F. W. MOLL SOHNE
发明人
分类号
E21D11/18
主分类号
E21D11/18
代理机构
代理人
主权项
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