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摘要
申请公布号
US1758872(A)
申请公布日期
1930.05.13
申请号
US19290330547
申请日期
1929.01.05
申请人
ROBERT WHEELER
发明人
WHEELER ROBERT
分类号
E05B63/02
主分类号
E05B63/02
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代理人
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