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发明名称
摘要
申请公布号
JPS53147828(U)
申请公布日期
1978.11.21
申请号
JP19770052889U
申请日期
1977.04.26
申请人
发明人
分类号
G03B19/12;(IPC1-7):G03B19/12
主分类号
G03B19/12
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代理人
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