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发明名称
Preheating system
摘要
申请公布号
US1765771(A)
申请公布日期
1930.06.24
申请号
US19270207043
申请日期
1927.07.20
申请人
THE KOPPERS COMPANY
发明人
PUENING FRANZ
分类号
C10B21/20
主分类号
C10B21/20
代理机构
代理人
主权项
地址
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