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发明名称
Building blocks for hollow walls
摘要
申请公布号
US2145187(A)
申请公布日期
1939.01.24
申请号
US19380200102
申请日期
1938.04.05
申请人
MILLER EDWARD G
发明人
MILLER EDWARD G.
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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