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发明名称
PROJECTION SCREEN
摘要
申请公布号
GB1479436(A)
申请公布日期
1977.07.13
申请号
GB19740026766
申请日期
1974.06.17
申请人
WASHINGTON SCIENTIFIC IND INC
发明人
分类号
G03B21/60;(IPC1-7):G03B21/60
主分类号
G03B21/60
代理机构
代理人
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地址
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