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发明名称
摘要
申请公布号
JPS4830966(A)
申请公布日期
1973.04.23
申请号
JP19720083841
申请日期
1972.08.23
申请人
发明人
分类号
G04B19/00;G04B45/00;(IPC1-7):G04B19/04
主分类号
G04B19/00
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代理人
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