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发明名称
Sample taking apparatus
摘要
申请公布号
US2285024(A)
申请公布日期
1942.06.02
申请号
US19390289519
申请日期
1939.08.11
申请人
FERGUSON JOHN B
发明人
FERGUSON JOHN B.
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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