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发明名称
Knock-off for board drop hammers and the like
摘要
申请公布号
US1833800(A)
申请公布日期
1931.11.24
申请号
US19290365491
申请日期
1929.05.23
申请人
CHAMBERSBURG ENGINEERING COMPANY
发明人
TERHUNE HOWARD
分类号
B21J7/36
主分类号
B21J7/36
代理机构
代理人
主权项
地址
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