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经营范围
发明名称
Air duct
摘要
申请公布号
US2215318(A)
申请公布日期
1940.09.17
申请号
US19390266261
申请日期
1939.04.06
申请人
BRISTOL ROBERT D
发明人
BRISTOL ROBERT D.
分类号
F16L41/02
主分类号
F16L41/02
代理机构
代理人
主权项
地址
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