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发明名称
FURNACES FOR PROCESSING EXPANDABLE VOLCANIC ROCK
摘要
申请公布号
CA850574(A)
申请公布日期
1970.09.01
申请号
CAD850574
申请日期
申请人
BRITISH AND OVERSEAS MINERALS LIMITED
发明人
ERWIN MACK
分类号
主分类号
代理机构
代理人
主权项
地址
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