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发明名称
Aparato respirador antipolvo con filtro colocado detrás de la cabeza del portador.
摘要
申请公布号
ES7492(Y)
申请公布日期
1944.06.01
申请号
ES19920000074U
申请日期
1942.05.08
申请人
SOCIETÁ ITALIANA PIRELLI
发明人
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主分类号
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