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发明名称
摘要
申请公布号
JPS5318289(Y2)
申请公布日期
1978.05.16
申请号
JP19720099790U
申请日期
1972.08.25
申请人
发明人
分类号
G02B5/12;E01F9/00;E01F9/015;G02B5/126;G09F13/16;(IPC1-7):G09F13/16
主分类号
G02B5/12
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