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发明名称
Extensible plank
摘要
申请公布号
US1774268(A)
申请公布日期
1930.08.26
申请号
US19290346405
申请日期
1929.03.12
申请人
CEPHAS W. EASTMAN
发明人
HARDING CHAUNCY
分类号
E04G1/15
主分类号
E04G1/15
代理机构
代理人
主权项
地址
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