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发明名称
BROCA DE CIRCULACAO MELHORADA APERFEICOADA
摘要
申请公布号
BR8607363(A)
申请公布日期
1989.08.15
申请号
BR19860007363
申请日期
1986.08.04
申请人
DOYLE W. MCCULLOUGH
发明人
DOYLE W. MCCULLOUGH
分类号
B05B3/04;E21B7/18;E21B10/18;E21B21/00;(IPC1-7):E21B10/18;E21B10/60
主分类号
B05B3/04
代理机构
代理人
主权项
地址
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