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发明名称
BORERADE OCH YTHERDADE SKERROTORER FOR BORRKRONOR
摘要
申请公布号
SE7703898(A)
申请公布日期
1978.03.01
申请号
SE19770003898
申请日期
1977.04.04
申请人
HUGHES TOOL COMPANY
发明人
DILL H C;SCALES S R
分类号
B22F7/06;C23C8/00;E21B10/50;(IPC1-7):E21B9/10
主分类号
B22F7/06
代理机构
代理人
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地址
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