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发明名称
摘要
申请公布号
NL7013244(A)
申请公布日期
1971.03.12
申请号
NL19700013244
申请日期
1970.09.08
申请人
发明人
分类号
B21B1/46;B21B13/20;B21B13/22;B22D11/14;(IPC1-7):C07C103/46
主分类号
B21B1/46
代理机构
代理人
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