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发明名称
Spacing form for soil pipes
摘要
申请公布号
US2508044(A)
申请公布日期
1950.05.16
申请号
US19450631571
申请日期
1945.11.29
申请人
SEDDON ABEL L
发明人
SEDDON ABEL L.
分类号
B28B21/74
主分类号
B28B21/74
代理机构
代理人
主权项
地址
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