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发明名称
DISPOSITIF D'ETANCHEITE DE QUEUE DE BOUCLIER DE PERCEMENT
摘要
申请公布号
FR2590931(B1)
申请公布日期
1989.12.22
申请号
FR19860016904
申请日期
1986.12.03
申请人
EISENHUTTE WESTFALIA GEWERKSCHAF
发明人
HANS GUNTER FOLLERT, HANS JUTTE, THOMAS KRAMER-WASSERKA;JUTTE HANS;KRAMER-WASSERKA THOMAS
分类号
E21D9/06;(IPC1-7):E21D9/06;E02B3/16
主分类号
E21D9/06
代理机构
代理人
主权项
地址
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