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发明名称
摘要
申请公布号
JPS42217(Y1)
申请公布日期
1967.01.09
申请号
JP19640035200U
申请日期
1964.05.07
申请人
发明人
分类号
G04B19/25;G04B19/24;G04B19/253;(IPC1-7):G04B19/24
主分类号
G04B19/25
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代理人
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