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发明名称
Metal working
摘要
申请公布号
US1974685(A)
申请公布日期
1934.09.25
申请号
US19280309301
申请日期
1928.09.29
申请人
THE COLD METAL PROCESS COMPANY
发明人
MCBAIN WILLIAM C.
分类号
B21B1/36
主分类号
B21B1/36
代理机构
代理人
主权项
地址
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