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发明名称
BURIED PIPE MAKING METHOD
摘要
申请公布号
CA2008123(A1)
申请公布日期
1990.07.20
申请号
CA19902008123
申请日期
1990.01.19
申请人
MATIERE, MARCEL
发明人
MATIERE, MARCEL
分类号
E01F5/00;E02D29/045;E02D29/05;F16L1/038
主分类号
E01F5/00
代理机构
代理人
主权项
地址
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