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摘要
申请公布号
US1830544(A)
申请公布日期
1931.11.03
申请号
US19300474484
申请日期
1930.08.11
申请人
ALEXANDER HERMAN
发明人
HERMAN ALEXANDER
分类号
E06B3/44
主分类号
E06B3/44
代理机构
代理人
主权项
地址
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