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发明名称
摘要
申请公布号
JPS5223553(B1)
申请公布日期
1977.06.24
申请号
JP19710049666
申请日期
1971.07.07
申请人
发明人
分类号
G03B17/26;G03B21/64;G03B42/04;G03C3/00;(IPC1-7):G03B41/18;B65H3/32
主分类号
G03B17/26
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