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发明名称
Safety device
摘要
申请公布号
US2080015(A)
申请公布日期
1937.05.11
申请号
US19360061624
申请日期
1936.01.30
申请人
NATIONAL TUBE COMPANY
发明人
SNEDDON JOHN
分类号
E06C7/16;E06C7/18
主分类号
E06C7/16
代理机构
代理人
主权项
地址
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