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经营范围
发明名称
ROAD CONSTRUCTION
摘要
申请公布号
CA424531(A)
申请公布日期
1944.12.19
申请号
CAD424531
申请日期
申请人
HERCULES POWDER COMPANY
发明人
JOHN HERPICK LONG
分类号
主分类号
代理机构
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