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发明名称
Delt kutterring
摘要
申请公布号
NO972161(D0)
申请公布日期
1997.05.09
申请号
NO19970002161
申请日期
1997.05.09
申请人
NARVESTAD AS, STEIN
发明人
NARVESTAD, STEIN
分类号
E21B
主分类号
E21B
代理机构
代理人
主权项
地址
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