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经营范围
发明名称
Air extractor
摘要
申请公布号
US1910088(A)
申请公布日期
1933.05.23
申请号
US19310562366
申请日期
1931.09.11
申请人
CHERRY BILLY W
发明人
CHERRY BILLY W.
分类号
C02F1/20
主分类号
C02F1/20
代理机构
代理人
主权项
地址
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