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经营范围
发明名称
摘要
申请公布号
JPH0550391(U)
申请公布日期
1993.07.02
申请号
JP19910112490U
申请日期
1991.12.03
申请人
发明人
分类号
G04B23/03;G04B45/00;(IPC1-7):G04B23/03
主分类号
G04B23/03
代理机构
代理人
主权项
地址
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