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发明名称
LICHTFILTERSYSTEM MIT VERAENDERLICHER DICHTE
摘要
申请公布号
DE2025688(B2)
申请公布日期
1971.10.28
申请号
DE19702025688
申请日期
1970.05.19
申请人
发明人
分类号
C09K9/00;A61F9/02;G02B5/23;G03C1/73;(IPC1-7):G02B5/22
主分类号
C09K9/00
代理机构
代理人
主权项
地址
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