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发明名称
A picture screen capable of providing a variable relief effect
摘要
申请公布号
GB786687(A)
申请公布日期
1957.11.20
申请号
GB19550031587
申请日期
1955.11.04
申请人
MARIO ROMOLI
发明人
分类号
G03B21/60
主分类号
G03B21/60
代理机构
代理人
主权项
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