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发明名称
Waste grab preventer and lubricating device
摘要
申请公布号
US2649343(A)
申请公布日期
1953.08.18
申请号
US19520268070
申请日期
1952.01.24
申请人
YELVERTON ELUM L
发明人
YELVERTON ELUM L.
分类号
B61F17/06
主分类号
B61F17/06
代理机构
代理人
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