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发明名称
Backenausblasverhinderer mit verbesserter Dichtung
摘要
申请公布号
DE69306537(T2)
申请公布日期
1997.05.22
申请号
DE19936006537T
申请日期
1993.10.25
申请人
HYDRIL CO., LOS ANGELES, CALIF., US
发明人
MORRILL, CHARLES D., HUMBLE, TEXAS 77338, US
分类号
E21B33/06;(IPC1-7):E21B33/06
主分类号
E21B33/06
代理机构
代理人
主权项
地址
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