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发明名称
Manufacture of projection screens
摘要
申请公布号
GB503156(A)
申请公布日期
1939.04.03
申请号
GB19370027716
申请日期
1937.10.12
申请人
GUSTAV KOEGEL
发明人
分类号
G03B21/60
主分类号
G03B21/60
代理机构
代理人
主权项
地址
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