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发明名称
DISPOSABLE DUST-MASK
摘要
申请公布号
PL246767(A1)
申请公布日期
1985.09.24
申请号
PL19840246767
申请日期
1984.03.20
申请人
POLITECHNIKA WARSZAWSKA
发明人
GRADON LEON
分类号
A62B;(IPC1-7):A62B/
主分类号
A62B
代理机构
代理人
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地址
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