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发明名称
(A1 B1) ;REGULATOR OF SMOKE GASSES FLOW VELOCITY WITHIN A SMOKE TUBE
摘要
申请公布号
HR20000577(A1)
申请公布日期
2002.06.30
申请号
HR20000000577
申请日期
2000.09.05
申请人
发明人
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主分类号
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