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发明名称
MULTI-STAGE FORMING OPERATIONS
摘要
申请公布号
US3707407(A)
申请公布日期
1972.12.26
申请号
USD3707407
申请日期
1970.04.21
申请人
BRITISH OXYGEN CO. LTD.:THE
发明人
ERICH R. SPIELMANN
分类号
B21D22/20;C21D7/13;(IPC1-7):C21D7/14
主分类号
B21D22/20
代理机构
代理人
主权项
地址
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