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发明名称
摘要
申请公布号
JPS552859(B2)
申请公布日期
1980.01.22
申请号
JP19720087476
申请日期
1972.08.31
申请人
发明人
分类号
G03B17/18;G03B7/00
主分类号
G03B17/18
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