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发明名称
摘要
申请公布号
JPS4934453(A)
申请公布日期
1974.03.29
申请号
JP19720077177
申请日期
1972.08.01
申请人
发明人
分类号
B21D26/12;B23K20/06;B23K20/26;C25F7/00
主分类号
B21D26/12
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代理人
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