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经营范围
发明名称
suportes rotacionais para chapeletas de controladores preventivos de explosão.
摘要
申请公布号
BR0209438(B1)
申请公布日期
2011.08.23
申请号
BR20020009438
申请日期
2002.05.03
申请人
发明人
EDWARD RYAN HEMPHILL
分类号
E21B33/06
主分类号
E21B33/06
代理机构
代理人
主权项
地址
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