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发明名称
Conduite d'exhaure d'air comprimé, de grisou ou de tout autre fluide à poser dans des puits profonds et combinaison de moyens en permettant la réalisation
摘要
申请公布号
FR1030131(A)
申请公布日期
1953.06.10
申请号
FRD1030131
申请日期
1950.12.26
申请人
ETABLISSEMENTS ALOIS LAUER
发明人
分类号
E21F17/02
主分类号
E21F17/02
代理机构
代理人
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