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发明名称
Ступенчатый экспонометр
摘要
申请公布号
SU39571(A1)
申请公布日期
1934.10.31
申请号
SU19330133814
申请日期
1933.08.23
申请人
GUREVICH S.G.
发明人
GUREVICH S.G.
分类号
G03B7/18
主分类号
G03B7/18
代理机构
代理人
主权项
地址
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