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发明名称
Ditch filler
摘要
申请公布号
US2529039(A)
申请公布日期
1950.11.07
申请号
US19480000629
申请日期
1948.01.05
申请人
MEYER ALVIN L
发明人
MEYER ALVIN L.
分类号
E02F5/22
主分类号
E02F5/22
代理机构
代理人
主权项
地址
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