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发明名称
摘要
申请公布号
JPS4969341(U)
申请公布日期
1974.06.17
申请号
JP19720113523U
申请日期
1972.09.30
申请人
发明人
分类号
G03B7/00;G03B7/20
主分类号
G03B7/00
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