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发明名称
Improvements in or relating to manufacturing concrete aggregates
摘要
申请公布号
GB351689(A)
申请公布日期
1931.07.02
申请号
GB19300015962
申请日期
1930.05.23
申请人
JOHN ECKERT GREENAWALT
发明人
分类号
C04B33/32
主分类号
C04B33/32
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代理人
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