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发明名称
摘要
申请公布号
JPS52111784(U)
申请公布日期
1977.08.25
申请号
JP19760019038U
申请日期
1976.02.20
申请人
发明人
分类号
F42B4/20;F42B4/00;(IPC1-7):F42B4/00
主分类号
F42B4/20
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代理人
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