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发明名称
Road grooving machine
摘要
申请公布号
US2311891(A)
申请公布日期
1943.02.23
申请号
US19410388941
申请日期
1941.04.17
申请人
HARRY TYSON
发明人
TYSON HARRY
分类号
E01C23/088
主分类号
E01C23/088
代理机构
代理人
主权项
地址
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