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发明名称
Apparatus for precasting concrete stair structures
摘要
申请公布号
US2161822(A)
申请公布日期
1939.06.13
申请号
US19370165295
申请日期
1937.09.23
申请人
FRANK KOGL
发明人
KOGL FRANK
分类号
B28B7/22
主分类号
B28B7/22
代理机构
代理人
主权项
地址
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