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发明名称
Dispositif pour l'augmentation supplémentaire de la charge de mise en place d'étançons hydrauliques de mines
摘要
申请公布号
FR1354734(A)
申请公布日期
1964.03.06
申请号
FR19630933916
申请日期
1963.05.07
申请人
发明人
GROETSCHEL KARL-MARIA
分类号
E21D15/44
主分类号
E21D15/44
代理机构
代理人
主权项
地址
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