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发明名称
Projection-screen system
摘要
申请公布号
US3311017(A)
申请公布日期
1967.03.28
申请号
US19640349115
申请日期
1964.03.03
申请人
ECKHOLM ROBERT J
发明人
ECKHOLM ROBERT J.
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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