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发明名称
Knurling tools
摘要
申请公布号
US2798391(A)
申请公布日期
1957.07.09
申请号
US19520310679
申请日期
1952.09.20
申请人
PORTO KNURLING TOOLS, INC.
发明人
BENNETT ANTHONY
分类号
B21H7/14
主分类号
B21H7/14
代理机构
代理人
主权项
地址
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