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发明名称
A SECURING DEVICE
摘要
申请公布号
EP0309445(B1)
申请公布日期
1990.10.03
申请号
EP19850903446
申请日期
1985.07.15
申请人
EMW-FOERSAELJNING AB
发明人
HESSELMAR, KARL GUSTAV
分类号
E21B23/00;E21B23/01;E21B41/00;F16B7/04
主分类号
E21B23/00
代理机构
代理人
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地址
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