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发明名称
摘要
申请公布号
JPS4992244(U)
申请公布日期
1974.08.09
申请号
JP19720136851U
申请日期
1972.11.28
申请人
发明人
分类号
G02B27/22;(IPC1-7):G02B27/22
主分类号
G02B27/22
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