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发明名称
Broennverktoey
摘要
申请公布号
NO173836(C)
申请公布日期
1994.02.09
申请号
NO19830001391
申请日期
1983.04.20
申请人
OTIS ENGINEERING CORPORATION
发明人
HIGGINS BRIAN D.
分类号
E21B34/12;E21B23/00;E21B23/02;E21B33/068;E21B34/00;(IPC1-7):E21B23/02
主分类号
E21B34/12
代理机构
代理人
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地址
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