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发明名称
摘要
申请公布号
JPS5549223(B2)
申请公布日期
1980.12.10
申请号
JP19750110484
申请日期
1975.09.13
申请人
发明人
分类号
B21D39/02;B21D19/02;E04D15/04
主分类号
B21D39/02
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代理人
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