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发明名称
Machine for making spiral pipe
摘要
申请公布号
US1939581(A)
申请公布日期
1933.12.12
申请号
US19310532601
申请日期
1931.04.24
申请人
THE AMERICAN ROLLING MILL COMPANY
发明人
TESMER WILLIAM
分类号
B21C37/12
主分类号
B21C37/12
代理机构
代理人
主权项
地址
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