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发明名称
Combination clean-out and sample tool
摘要
申请公布号
US2109197(A)
申请公布日期
1938.02.22
申请号
US19360098632
申请日期
1936.08.31
申请人
HUMASON GRANVILLE A
发明人
HUMASON GRANVILLE A.
分类号
E21B37/00
主分类号
E21B37/00
代理机构
代理人
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地址
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