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发明名称
Stage lift flow device
摘要
申请公布号
US2323893(A)
申请公布日期
1943.07.13
申请号
US19390308315
申请日期
1939.12.08
申请人
ALEXANDER BOYNTON
发明人
BOYNTON ALEXANDER
分类号
F04F1/18
主分类号
F04F1/18
代理机构
代理人
主权项
地址
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