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发明名称
BILLET FOR EXTRUSION TUBE MAKING AND EXTRUSION TUBE MAKING METHOD
摘要
申请公布号
JPH0255615(A)
申请公布日期
1990.02.26
申请号
JP19880204249
申请日期
1988.08.17
申请人
SUMITOMO METAL IND LTD
发明人
AKIYAMA MASAYOSHI;YAMADERA YOSHIMI
分类号
B21C23/00;B21C23/32
主分类号
B21C23/00
代理机构
代理人
主权项
地址
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