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发明名称
Clapet de retenue pour installations d'aération, en particulier pour installations d'aération de chambres de protection, abris, et similaires
摘要
申请公布号
FR878552(A)
申请公布日期
1943.01.25
申请号
FRD878552
申请日期
1942.01.17
申请人
发明人
DRAGER OTTO HEINRICH
分类号
A62B13/00;F02M19/00
主分类号
A62B13/00
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