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发明名称
Method and apparatus for forming spiral pipe
摘要
申请公布号
US3287536(A)
申请公布日期
1966.11.22
申请号
US19650442391
申请日期
1965.03.24
申请人
FAY PIPE AND PILE CO., INC.
发明人
FAY JAMES E.
分类号
B21C37/12
主分类号
B21C37/12
代理机构
代理人
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地址
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