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经营范围
发明名称
Production of large diameter thinwalled tubing
摘要
申请公布号
US3271987(A)
申请公布日期
1966.09.13
申请号
US19650510651
申请日期
1965.11.30
申请人
HALSTEAD METAL PRODUCTS, INC.
发明人
DOUTHETT DELORMA M.;MITCHELL GEORGE A.
分类号
B21C1/18
主分类号
B21C1/18
代理机构
代理人
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