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发明名称
摘要
申请公布号
CH639367(A4)
申请公布日期
1970.04.30
申请号
CHD639367D
申请日期
1967.05.05
申请人
发明人
分类号
G04C3/04;G04C3/06
主分类号
G04C3/04
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代理人
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