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发明名称
摘要
申请公布号
JPS4861337(U)
申请公布日期
1973.08.04
申请号
JP19710106374U
申请日期
1971.11.13
申请人
发明人
分类号
G03B7/00;H01C10/16;H01C10/20
主分类号
G03B7/00
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