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发明名称
摘要
申请公布号
JPS5056616(A)
申请公布日期
1975.05.17
申请号
JP19730106925
申请日期
1973.09.25
申请人
发明人
分类号
F16L9/02;B21C37/20;B21D15/06;F16L9/00
主分类号
F16L9/02
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代理人
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