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发明名称
MAGNETIC JUNK SUB
摘要
申请公布号
CA670699(A)
申请公布日期
1963.09.17
申请号
CAD670699
申请日期
申请人
SENTINEL OIL TOOL DEVELOPMENT AND SERVICES LTD.
发明人
GEORGE C. CROOKS
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主分类号
代理机构
代理人
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