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发明名称
Blade sharpener for lawn mowers
摘要
申请公布号
US2140437(A)
申请公布日期
1938.12.13
申请号
US19370157625
申请日期
1937.08.05
申请人
WALKER HORACE T
发明人
WALKER HORACE T.
分类号
B24B3/42
主分类号
B24B3/42
代理机构
代理人
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