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发明名称
DAMPER FOR WARM AIR FURNACES
摘要
申请公布号
CA315701(A)
申请公布日期
1931.09.29
申请号
CAD315701
申请日期
申请人
THE GENERAL STEEL WARES LIMITED
发明人
RALPH S. MCNANEY
分类号
主分类号
代理机构
代理人
主权项
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