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发明名称
WELL BORE SCRAPER
摘要
申请公布号
CA804379(A)
申请公布日期
1969.01.21
申请号
CAD804379
申请日期
申请人
CHARLES F. BARNARD
发明人
CHARLES F. BARNARD
分类号
主分类号
代理机构
代理人
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