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发明名称
摘要
申请公布号
JPS564349(B2)
申请公布日期
1981.01.29
申请号
JP19730089254
申请日期
1973.08.10
申请人
发明人
分类号
B21D53/06;B23K1/00;B23K1/06;F28F1/30
主分类号
B21D53/06
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代理人
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