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发明名称
PAKNINGSENHET.
摘要
申请公布号
NO903829(A)
申请公布日期
1987.03.12
申请号
NO19900003829
申请日期
1990.09.03
申请人
DOWELL SCHLUMBERGER INC
发明人
MCGILL, HOWARD L.;SCRANTON, JOSEPH D.
分类号
E21B;(IPC1-7):E21B/
主分类号
E21B
代理机构
代理人
主权项
地址
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