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经营范围
发明名称
Screw pump
摘要
申请公布号
US2085622(A)
申请公布日期
1937.06.29
申请号
US19330682013
申请日期
1933.07.24
申请人
RUDOLPH WITT
发明人
WITT RUDOLPH
分类号
F04C9/00
主分类号
F04C9/00
代理机构
代理人
主权项
地址
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