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发明名称
PROJECTION SCREENS
摘要
申请公布号
GB1580722(A)
申请公布日期
1980.12.03
申请号
GB19770015348
申请日期
1977.04.13
申请人
SCHUDEL C
发明人
分类号
G03B21/60;G03B21/56;(IPC1-7):G03B21/60
主分类号
G03B21/60
代理机构
代理人
主权项
地址
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