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发明名称
VENTILATING FAN UNIT
摘要
申请公布号
CA457581(A)
申请公布日期
1949.06.28
申请号
CAD457581
申请日期
申请人
DEREK RICHARD BARKER;WILLIAM HARRY BARKER
发明人
DEREK RICHARD BARKER;WILLIAM HARRY BARKER
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主分类号
代理机构
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