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发明名称
Apparatus for producing concrete stair steps
摘要
申请公布号
US2869212(A)
申请公布日期
1959.01.20
申请号
US19540431476
申请日期
1954.05.21
申请人
HART ARTHUR A
发明人
HART ARTHUR A.
分类号
B28B7/02
主分类号
B28B7/02
代理机构
代理人
主权项
地址
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