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发明名称
Method of making workpieces provided with head and shank, especially screw bolts
摘要
申请公布号
US2799027(A)
申请公布日期
1957.07.16
申请号
US19530387927
申请日期
1953.10.23
申请人
BERNHARD HATEBUR FRITZ
发明人
HATEBUR FRITZ BERNHARD
分类号
B21K1/46
主分类号
B21K1/46
代理机构
代理人
主权项
地址
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