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发明名称
Building block
摘要
申请公布号
US1751748(A)
申请公布日期
1930.03.25
申请号
US19280282032
申请日期
1928.05.31
申请人
JOHN NASH
发明人
NASH JOHN
分类号
E04B2/30
主分类号
E04B2/30
代理机构
代理人
主权项
地址
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