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发明名称
DOPPEL-FENSTERWINKEL.
摘要
申请公布号
DE1641498(U)
申请公布日期
1952.07.24
申请号
DE195200B8580U
申请日期
1952.04.08
申请人
PETER E. BECKER
发明人
PETER E. BECKER
分类号
主分类号
代理机构
代理人
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