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发明名称
Depthograph plate holder
摘要
申请公布号
US1874047(A)
申请公布日期
1932.08.30
申请号
US19300454861
申请日期
1930.05.23
申请人
KANOLT CLARENCE W
发明人
KANOLT CLARENCE W.
分类号
G03B35/24
主分类号
G03B35/24
代理机构
代理人
主权项
地址
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