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发明名称
Drop hammer
摘要
申请公布号
US1954159(A)
申请公布日期
1934.04.10
申请号
US19310564013
申请日期
1931.09.21
申请人
THE VLCHEK TOOL COMPANY
发明人
WATTLEWORTH JOHN C.
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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