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摘要
申请公布号
US3108688(A)
申请公布日期
1963.10.29
申请号
US19610140387
申请日期
1961.09.25
申请人
E. I. DU PONT DE NEMOURS AND COMPANY
发明人
JR. ALLAN WHATLEY,;CLOUGH ROBERT EDWARD
分类号
G03B23/06
主分类号
G03B23/06
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