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发明名称
STOP FOR WELL DEVICES
摘要
申请公布号
CA714893(A)
申请公布日期
1965.08.03
申请号
CAD714893
申请日期
申请人
OTIS ENGINEERING CORPORATION
发明人
JOHN V. FREDD
分类号
主分类号
代理机构
代理人
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地址
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