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经营范围
发明名称
MATA BOR PUTAR
摘要
申请公布号
ID24322(A)
申请公布日期
2000.07.13
申请号
ID20000000184
申请日期
1998.06.05
申请人
DRESSER INDUSTRIES, INC.
发明人
EDWARD C. SPATZ
分类号
E21B10/56;E21B10/567
主分类号
E21B10/56
代理机构
代理人
主权项
地址
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