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发明名称
COMBINED FLUE AND CHECK DRAFT DAMPER UNIT
摘要
申请公布号
CA552369(A)
申请公布日期
1958.01.28
申请号
CAD552369
申请日期
申请人
NATIONAL FUEL CONSERVATION CO.
发明人
MICHAEL A. CROZIER
分类号
主分类号
代理机构
代理人
主权项
地址
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