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经营范围
发明名称
Piercing point
摘要
申请公布号
US1963320(A)
申请公布日期
1934.06.19
申请号
US19320594728
申请日期
1932.02.23
申请人
NATIONAL TUBE COMPANY
发明人
WRIGHT EDWIN C.
分类号
B21B25/00
主分类号
B21B25/00
代理机构
代理人
主权项
地址
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