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经营范围
发明名称
VENTILSYSTEM FUER AUFBLASBAREN PACKER.
摘要
申请公布号
DE3674868(D1)
申请公布日期
1990.11.15
申请号
DE19863674868
申请日期
1986.09.05
申请人
WEATHERFORD/LAMB, INC., HOUSTON, TEX., US
发明人
STRINGFELLOW, WILLIAM DOYLE, HOUSTON TEXAS 77042, US
分类号
E21B33/127;(IPC1-7):E21B33/127
主分类号
E21B33/127
代理机构
代理人
主权项
地址
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