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摘要
申请公布号
US2143063(A)
申请公布日期
1939.01.10
申请号
US19370160040
申请日期
1937.08.20
申请人
FETTEROLF LAYTON R
发明人
FETTEROLF LAYTON R.
分类号
B23D71/00
主分类号
B23D71/00
代理机构
代理人
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