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发明名称
METODO ED APPARECCHIO PER LA FABBRICAZIONE DI TUBI A SPIRALE.
摘要
申请公布号
IT8121331(D0)
申请公布日期
1981.04.22
申请号
IT19810021331
申请日期
1981.04.22
申请人
NIPPON STEEL CORP.
发明人
YOSHITO TSUYAMA;YASUMI SHIMAZAKI;KAZUTOSHI KAKITA;TOSHIO HIROKAWA
分类号
B21C37/12;(IPC1-7):B21H/
主分类号
B21C37/12
代理机构
代理人
主权项
地址
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