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发明名称
PHOTOGRAPHIC ENLARGER OPTICAL SYSTEM
摘要
申请公布号
SU1645934(A1)
申请公布日期
1991.04.30
申请号
SU19884615055
申请日期
1988.12.05
申请人
SAPOZHNIKOV YAKOV M,SU;RAVIN NATAN YA,SU
发明人
SAPOZHNIKOV YAKOV M,SU;RAVIN NATAN YA,SU
分类号
G03B27/54
主分类号
G03B27/54
代理机构
代理人
主权项
地址
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