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发明名称
Gebogener Projektionsschirm
摘要
申请公布号
AT267221(B)
申请公布日期
1968.12.27
申请号
AT19670005507
申请日期
1964.03.31
申请人
发明人
JULES HOURDIAUX
分类号
G03B21/56;G03B21/60
主分类号
G03B21/56
代理机构
代理人
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