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发明名称
SHEET METAL WORKING.
摘要
申请公布号
IE11246(L)
申请公布日期
1930.12.27
申请号
IED11246
申请日期
1930.04.16
申请人
HUGO SEIFERTH.
发明人
分类号
B21D31/00;B21D43/00;B23K;(IPC1-7):B23K
主分类号
B21D31/00
代理机构
代理人
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