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发明名称
Method of forming bolts
摘要
申请公布号
US1896837(A)
申请公布日期
1933.02.07
申请号
US19310533650
申请日期
1931.04.29
申请人
WESTERN RAILWAY EQUIPMENT COMPANY
发明人
CAMPBELL STERLING H.;HABENICHT FREDERICK K.
分类号
B21K1/44
主分类号
B21K1/44
代理机构
代理人
主权项
地址
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