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经营范围
发明名称
Hydraulic scraper
摘要
申请公布号
US1921221(A)
申请公布日期
1933.08.08
申请号
US19310533031
申请日期
1931.04.27
申请人
CHARLES G. WILLETT
发明人
DEAN GEORGE E.
分类号
E02F3/84
主分类号
E02F3/84
代理机构
代理人
主权项
地址
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