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发明名称
Method and means for forming hollow articles
摘要
申请公布号
US1749428(A)
申请公布日期
1930.03.04
申请号
US19260111990
申请日期
1926.05.27
申请人
STEEL AND TUBES, INC.
发明人
HOLMES EARL K.
分类号
B21C37/30
主分类号
B21C37/30
代理机构
代理人
主权项
地址
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