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发明名称
Building material
摘要
申请公布号
US1929256(A)
申请公布日期
1933.10.03
申请号
US19310537835
申请日期
1931.05.16
申请人
OTIS SAMUEL S
发明人
OTIS SAMUEL S.
分类号
E04C1/40
主分类号
E04C1/40
代理机构
代理人
主权项
地址
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