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发明名称
écran pour des projections par transparence
摘要
申请公布号
FR1003695(A)
申请公布日期
1952.03.20
申请号
FRD1003695
申请日期
1947.02.14
申请人
发明人
KLAUSZ ERNEST
分类号
G03B21/62
主分类号
G03B21/62
代理机构
代理人
主权项
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