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经营范围
发明名称
UNDERVANNS BROENNHODESYSTEM.
摘要
申请公布号
NO830501(A)
申请公布日期
1983.08.17
申请号
NO19830000501
申请日期
1983.02.15
申请人
SMITH INTERNATIONAL, INC,
发明人
BAUGH, BENTON F.,
分类号
E21B33/00;E21B33/043;F16J15/12;(IPC1-7):E21B/
主分类号
E21B33/00
代理机构
代理人
主权项
地址
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