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发明名称
Scraper
摘要
申请公布号
US2262283(A)
申请公布日期
1941.11.11
申请号
US19400349318
申请日期
1940.08.01
申请人
HENRY ALBERT R;WILLS MARION C
发明人
HENRY ALBERT R.;WILLS MARION C.
分类号
E02F3/64
主分类号
E02F3/64
代理机构
代理人
主权项
地址
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