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经营范围
发明名称
Side wall sampler
摘要
申请公布号
US2299076(A)
申请公布日期
1942.10.20
申请号
US19410376687
申请日期
1941.01.30
申请人
BYNUM PINK T
发明人
BYNUM PINK T.
分类号
E21B49/06
主分类号
E21B49/06
代理机构
代理人
主权项
地址
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