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摘要
申请公布号
US2291492(A)
申请公布日期
1942.07.28
申请号
US19410394814
申请日期
1941.05.23
申请人
THE MILLER COMPANY
发明人
NAYSMITH SHIRLEY R.
分类号
F21V21/00;F21V21/112
主分类号
F21V21/00
代理机构
代理人
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