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发明名称
Dump bailer
摘要
申请公布号
US2956624(A)
申请公布日期
1960.10.18
申请号
US19580726360
申请日期
1958.04.04
申请人
GREAT LAKES CARBON CORPORATION
发明人
TOELKE LESTER W.
分类号
E21B27/02
主分类号
E21B27/02
代理机构
代理人
主权项
地址
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