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发明名称
Système d'assemblage pour bèles ou poutres de soutènement
摘要
申请公布号
FR60583(E)
申请公布日期
1954.11.09
申请号
FRD60583
申请日期
1950.08.29
申请人
LE PROGRES CHARBONNIER PROCHAR
发明人
分类号
E21D17/086
主分类号
E21D17/086
代理机构
代理人
主权项
地址
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