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发明名称
摘要
申请公布号
JPS5522854(B2)
申请公布日期
1980.06.19
申请号
JP19720068442
申请日期
1972.07.07
申请人
发明人
分类号
G02B27/00;G02B27/42;G11B7/00;G11B7/003;G11B7/0065;G11B7/135
主分类号
G02B27/00
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