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发明名称
Jet string and weight can assembly
摘要
申请公布号
US3376922(A)
申请公布日期
1968.04.09
申请号
US19660556220
申请日期
1966.06.08
申请人
MOBIL OIL CORPORATION
发明人
JR. ERNST LEONHARDT,
分类号
E21B7/12;E21B7/18;E21B43/10
主分类号
E21B7/12
代理机构
代理人
主权项
地址
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