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发明名称
Hob
摘要
申请公布号
US2050233(A)
申请公布日期
1936.08.04
申请号
US19310524329
申请日期
1931.03.21
申请人
GLEASON WORKS
发明人
HEAD ERNEST C.
分类号
B23F9/08;B23F21/18
主分类号
B23F9/08
代理机构
代理人
主权项
地址
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