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经营范围
发明名称
Helical broach
摘要
申请公布号
US2898670(A)
申请公布日期
1959.08.11
申请号
US19550551042
申请日期
1955.12.05
申请人
NATIONAL BROACH & MACHINE COMPANY
发明人
PERNACK FRANK
分类号
B23D43/00;B23F21/26
主分类号
B23D43/00
代理机构
代理人
主权项
地址
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