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发明名称
摘要
申请公布号
JPS50130321(U)
申请公布日期
1975.10.25
申请号
JP19740040475U
申请日期
1974.04.09
申请人
发明人
分类号
G03B27/58;G03C3/00;G03F7/00;G03F7/20;(IPC1-7):G03C3/00
主分类号
G03B27/58
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