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发明名称
摘要
申请公布号
JPH0342995(B2)
申请公布日期
1991.06.28
申请号
JP19870061212
申请日期
1987.03.18
申请人
发明人
分类号
B21D39/20;B23K9/02;B23K9/028
主分类号
B21D39/20
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代理人
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地址
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