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发明名称
CENTRIFUGALLY CAST PERFORATED RINGS
摘要
申请公布号
GB1216891(A)
申请公布日期
1970.12.23
申请号
GB19680004880
申请日期
1968.01.31
申请人
CERTAIN-TEED/SAINT GOBAIN INSULATION CORPORATION
发明人
分类号
B22D13/04
主分类号
B22D13/04
代理机构
代理人
主权项
地址
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