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发明名称
摘要
申请公布号
JPS4727939(U)
申请公布日期
1972.11.29
申请号
JP19710029832U
申请日期
1971.04.18
申请人
发明人
分类号
G03B7/12;G03B7/20;G03B9/02
主分类号
G03B7/12
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代理人
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地址
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