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发明名称
Stopper heads
摘要
申请公布号
US2772176(A)
申请公布日期
1956.11.27
申请号
US19530340380
申请日期
1953.03.04
申请人
ELECTRO REFRACTORIES & ABRASIVES CORPORATION
发明人
LEITTEN CARL F.
分类号
C04B35/18;C04B35/66
主分类号
C04B35/18
代理机构
代理人
主权项
地址
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