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经营范围
发明名称
Spider structure
摘要
申请公布号
US3001781(A)
申请公布日期
1961.09.26
申请号
US19590828615
申请日期
1959.07.21
申请人
ESCO CORPORATION
发明人
WALKER DOUGLAS B.
分类号
C21D9/54;C21D9/673
主分类号
C21D9/54
代理机构
代理人
主权项
地址
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