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经营范围
发明名称
DRAIN PIPE TRENCH BACKFILLING MACHINE
摘要
申请公布号
PL150481(B2)
申请公布日期
1990.05.31
申请号
PL19880272332
申请日期
1988.05.06
申请人
发明人
分类号
E02B11/02;E02F;E02F5/12;(IPC1-7):E02B11/02
主分类号
E02B11/02
代理机构
代理人
主权项
地址
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