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经营范围
发明名称
Ventilating apparatus
摘要
申请公布号
US2072780(A)
申请公布日期
1937.03.02
申请号
US19360058362
申请日期
1936.01.09
申请人
TURNER FRED L
发明人
TURNER FRED L.
分类号
E03D9/052
主分类号
E03D9/052
代理机构
代理人
主权项
地址
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