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发明名称
摘要
申请公布号
JPS551566(B2)
申请公布日期
1980.01.16
申请号
JP19730043792
申请日期
1973.04.18
申请人
发明人
分类号
G03B27/12;G03B27/14;G03B27/24
主分类号
G03B27/12
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