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摘要
申请公布号
US2154510(A)
申请公布日期
1939.04.18
申请号
US19360107514
申请日期
1936.10.26
申请人
ROLLIN KING;BOADEN EARL T
发明人
KING ROLLIN;BOADEN EARL T.
分类号
G03B21/64
主分类号
G03B21/64
代理机构
代理人
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