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发明名称
Dispositif de sécurité collective pour la sauvegarde de la vie des mineurs travaillant dans les mines contre les coups de grisou, de poussier, etc.
摘要
申请公布号
FR64241(E)
申请公布日期
1955.11.09
申请号
FRD64241
申请日期
1953.04.29
申请人
发明人
WARTELLE JUSTE
分类号
E21F11/00
主分类号
E21F11/00
代理机构
代理人
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