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发明名称
摘要
申请公布号
JPS4717649(U)
申请公布日期
1972.10.30
申请号
JP19710022170U
申请日期
1971.03.30
申请人
发明人
分类号
G03D3/00;G03D3/10;(IPC1-7):G03D3/10
主分类号
G03D3/00
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代理人
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