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发明名称
Electrically operated welder's hood
摘要
申请公布号
US1822308(A)
申请公布日期
1931.09.08
申请号
US19300493618
申请日期
1930.11.05
申请人
NORTON JOHN S
发明人
NORTON JOHN S.
分类号
A61F9/06
主分类号
A61F9/06
代理机构
代理人
主权项
地址
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