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经营范围
发明名称
SCRATCHERS FOR WELL BORES
摘要
申请公布号
CA585014(A)
申请公布日期
1959.10.13
申请号
CAD585014
申请日期
申请人
BAKER OIL TOOLS
发明人
JOHN R. BAKER
分类号
主分类号
代理机构
代理人
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