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发明名称
摘要
申请公布号
JPH02113731(U)
申请公布日期
1990.09.12
申请号
JP19890021362U
申请日期
1989.02.28
申请人
发明人
分类号
G03B21/16;F21V29/00;G03B21/20;G03B21/22;(IPC1-7):G03B21/20
主分类号
G03B21/16
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代理人
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