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发明名称
Safety devices for deep well pump drive shafts
摘要
申请公布号
US2783319(A)
申请公布日期
1957.02.26
申请号
US19550508934
申请日期
1955.05.17
申请人
KILLINGSWORTH WILLIAM D
发明人
KILLINGSWORTH WILLIAM D.
分类号
G05G15/00
主分类号
G05G15/00
代理机构
代理人
主权项
地址
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