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发明名称
Work head
摘要
申请公布号
US2039847(A)
申请公布日期
1936.05.05
申请号
US19340737156
申请日期
1934.07.27
申请人
HOWLAND-SHEARMAN CHARLES H
发明人
HOWLAND-SHEARMAN CHARLES H.
分类号
B21D28/00
主分类号
B21D28/00
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