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经营范围
发明名称
Improvements in respirators
摘要
申请公布号
GB597960(A)
申请公布日期
1948.02.06
申请号
GB19450017629
申请日期
1945.07.10
申请人
AMERICAN OPTICAL COMPANY
发明人
分类号
A41D13/11;A61F5/56
主分类号
A41D13/11
代理机构
代理人
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