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发明名称
Hob
摘要
申请公布号
US1787590(A)
申请公布日期
1931.01.06
申请号
US19280271693
申请日期
1928.04.21
申请人
ILLINOIS TOOL WORKS
发明人
OLSON CARL G.
分类号
B23F21/16
主分类号
B23F21/16
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