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发明名称
Perfectionnement apporté aux masques de protection
摘要
申请公布号
FR1094502(A)
申请公布日期
1955.05.20
申请号
FRD1094502
申请日期
1953.11.24
申请人
发明人
HOFF ARNOLD
分类号
A62B18/02
主分类号
A62B18/02
代理机构
代理人
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