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发明名称
摘要
申请公布号
DE2118358(A1)
申请公布日期
1972.11.02
申请号
DE19712118358
申请日期
1971.04.15
申请人
发明人
分类号
G02C3/00;G02C5/14
主分类号
G02C3/00
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