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发明名称
摘要
申请公布号
JPS5512173(Y2)
申请公布日期
1980.03.17
申请号
JP19720071540U
申请日期
1972.06.16
申请人
发明人
分类号
G03B17/00;G03B9/08;G03B9/66;G03B9/68;G03B17/42;(IPC1-7):G03B17/42
主分类号
G03B17/00
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