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发明名称
BROENNHODE.
摘要
申请公布号
NO862688(A)
申请公布日期
1987.01.05
申请号
NO19860002688
申请日期
1986.07.02
申请人
CAMERON IRON WORKS INC.
发明人
CROTWELL, GERALD W.
分类号
E21B33/035;E21B33/043;(IPC1-7):E21B/
主分类号
E21B33/035
代理机构
代理人
主权项
地址
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