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发明名称
Road-grading device
摘要
申请公布号
US1756329(A)
申请公布日期
1930.04.29
申请号
US19280286633
申请日期
1928.06.19
申请人
ANDREW HARRY R
发明人
ANDREW HARRY R.
分类号
E02F3/76
主分类号
E02F3/76
代理机构
代理人
主权项
地址
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