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摘要
申请公布号
US2240053(A)
申请公布日期
1941.04.29
申请号
US19390266065
申请日期
1939.04.05
申请人
KING RICHARDSON
发明人
RICHARDSON KING
分类号
G01J3/52
主分类号
G01J3/52
代理机构
代理人
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