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发明名称
摘要
申请公布号
FR2003684(A1)
申请公布日期
1969.11.14
申请号
FR19690003848
申请日期
1969.02.17
申请人
BARR ET STROUD
发明人
分类号
G02B27/64;(IPC1-7):G02B23/00;G01C21/00;F41G11/00
主分类号
G02B27/64
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