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发明名称
METHOD AND APPARATUS FOR MAKING CONCRETE PIPE
摘要
申请公布号
CA796238(A)
申请公布日期
1968.10.08
申请号
CAD796238
申请日期
申请人
DONALD L. WELLING
发明人
DONALD L. WELLING
分类号
主分类号
代理机构
代理人
主权项
地址
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