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发明名称
MANUFACTURE OF HOLLOW SINTERED HARD ROLL WITH MULTIPLE STRUCTURE
摘要
申请公布号
JPH067808(A)
申请公布日期
1994.01.18
申请号
JP19920167769
申请日期
1992.06.25
申请人
KOBE STEEL LTD
发明人
SHIOYAMA HITOSHI
分类号
B21B27/00;B23K9/04;B23K31/00;C25D7/04;(IPC1-7):B21B27/00
主分类号
B21B27/00
代理机构
代理人
主权项
地址
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