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发明名称
O-ring protecting apparatus of vacuum tank for refining molten metal
摘要
申请公布号
KR101040644(B1)
申请公布日期
2011.06.10
申请号
KR20090024806
申请日期
2009.03.24
申请人
发明人
分类号
C21C7/10
主分类号
C21C7/10
代理机构
代理人
主权项
地址
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