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发明名称
Perfectionnements apportés aux soutènements à ancrages, en particulier pour galeries d'abattages dans l'exploitation des mines de houille
摘要
申请公布号
FR1168428(A)
申请公布日期
1958.12.08
申请号
FRD1168428
申请日期
1957.01.15
申请人
BERGBAU-AKTIENGESELLSCHAFT CONSTANTIN DER GROSSE
发明人
分类号
E21D11/00
主分类号
E21D11/00
代理机构
代理人
主权项
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