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发明名称
SILICEOUS MATERIAL PROCESSING
摘要
申请公布号
CA330780(A)
申请公布日期
1933.03.07
申请号
CAD330780
申请日期
申请人
THE PETER SPENCE AND SONS
发明人
ALFRED KIRKHAM
分类号
主分类号
代理机构
代理人
主权项
地址
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