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发明名称
Vorrichtung zum Abdichten eines verrohrten OElbohrloches
摘要
申请公布号
DE1064897(B)
申请公布日期
1959.09.10
申请号
DE1955ST09330
申请日期
1955.01.19
申请人
JERSEY PRODUCTION RESEARCH COMPANY
发明人
分类号
E21B33/134
主分类号
E21B33/134
代理机构
代理人
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地址
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