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发明名称
摘要
申请公布号
CH677057(A)
申请公布日期
1991.04.15
申请号
CH19870003812
申请日期
1987.10.01
申请人
发明人
分类号
G04B19/06;G04B19/28
主分类号
G04B19/06
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代理人
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地址
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