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发明名称
Projection screens
摘要
申请公布号
GB741940(A)
申请公布日期
1955.12.14
申请号
GB19520029617
申请日期
1952.11.24
申请人
GLOWMETER CORPORATION
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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