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发明名称
BROENNVERKTOEY.
摘要
申请公布号
NO874406(D0)
申请公布日期
1987.10.22
申请号
NO19870004406
申请日期
1987.10.22
申请人
OTIS ENGINEERING CORP
发明人
HIGGINS, BRIAN
分类号
E21B23/02;E21B34/10;(IPC1-7):E21B/
主分类号
E21B23/02
代理机构
代理人
主权项
地址
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