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经营范围
发明名称
Power tongs
摘要
申请公布号
GB9509657(D0)
申请公布日期
1995.07.05
申请号
GB19950009657
申请日期
1995.05.12
申请人
WEATHERFORD OIL TOOL GMBH
发明人
分类号
E21B19/16
主分类号
E21B19/16
代理机构
代理人
主权项
地址
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