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发明名称
TREKKVERKTOEY.
摘要
申请公布号
NO820003(A)
申请公布日期
1982.08.19
申请号
NO19820000003
申请日期
1982.01.04
申请人
OTIS ENGINEERING CORP,
发明人
TAMPLEN, JACK W.,
分类号
E21B31/18;(IPC1-7):E21B/
主分类号
E21B31/18
代理机构
代理人
主权项
地址
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