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发明名称
RUBBLE CLEANER FOR BOTTOM HOLE FORMATION TESTER
摘要
申请公布号
CA643519(A)
申请公布日期
1962.06.26
申请号
CAD643519
申请日期
申请人
CALIFORNIA RESEARCH CORPORATION
发明人
JOHN E. WALSTROM
分类号
主分类号
代理机构
代理人
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