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发明名称
PERFECCIONAMIENTOS EN LOS MARTINETES PARA EL DESPRENDIMIENTO MECANICO DE CARBËN U OTROS MINERALES, PRINCIPALMENTE EN ESTRATOS PLANOS
摘要
申请公布号
ES278891(A3)
申请公布日期
1962.11.16
申请号
ES19910002788
申请日期
1962.07.03
申请人
BAYERISCHE BERG. HUTTEN-UN SALZWERKE AKTIENGESELLSCHAFT
发明人
分类号
E21C;(IPC1-7):E21C
主分类号
E21C
代理机构
代理人
主权项
地址
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