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经营范围
发明名称
DOUBLE LAYER HIGH STRENGTH CONCRETE PIPE
摘要
申请公布号
US3581780(A)
申请公布日期
1971.06.01
申请号
USD3581780
申请日期
1969.04.18
申请人
DENKI KAGAKU KOGYO KK.
发明人
YOSHIZO ONO;SATORU FURUI
分类号
C04B22/00;C04B28/04;C04B28/06;F16L9/08;(IPC1-7):F16L9/08
主分类号
C04B22/00
代理机构
代理人
主权项
地址
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