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发明名称
Bèle pour le soutènement du toit dans les chantiers et galeries de mines
摘要
申请公布号
FR1044988(A)
申请公布日期
1953.11.23
申请号
FRD1044988
申请日期
1951.11.09
申请人
发明人
LENTACKER CHARLES
分类号
E21D11/18;E21D17/086
主分类号
E21D11/18
代理机构
代理人
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