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发明名称
Packer
摘要
申请公布号
US2868297(A)
申请公布日期
1959.01.13
申请号
US19560606916
申请日期
1956.08.29
申请人
JERSEY PRODUCTION RESEARCH COMPANY
发明人
JR. JACK L. LAMBERSON,
分类号
E21B23/02;E21B33/126
主分类号
E21B23/02
代理机构
代理人
主权项
地址
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