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发明名称
Multiple speed power transmitting means for sewer rod tractors
摘要
申请公布号
US2578584(A)
申请公布日期
1951.12.11
申请号
US19470765494
申请日期
1947.08.01
申请人
OSBORN WILLIAM D
发明人
OSBORN WILLIAM D.
分类号
E03F9/00
主分类号
E03F9/00
代理机构
代理人
主权项
地址
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