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发明名称
Improvements in or relating to optical projection apparatus
摘要
申请公布号
GB829692(A)
申请公布日期
1960.03.02
申请号
GB19560033964
申请日期
1956.11.07
申请人
ILFORD LIMITED
发明人
SMITH ARTHUR ERNEST
分类号
G03B21/00;G03B27/54
主分类号
G03B21/00
代理机构
代理人
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