dispositivo de limpeza de uma coluna de invólucro de broca de percussão.,申请号BR20000012746-传众专利搜索

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发明名称	dispositivo de limpeza de uma coluna de invólucro de broca de percussão.
摘要
申请公布号	BR0012746(B1)	申请公布日期	2009.01.13
申请号	BR20000012746	申请日期	2000.07.20
申请人		发明人	JR. BILLY L. BROWN
分类号	E21B37/00;E21B37/02	主分类号	E21B37/00
代理机构		代理人
主权项
地址

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