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经营范围
发明名称
IMPROVEMENTS IN CULVERTS
摘要
申请公布号
ZM2869(A1)
申请公布日期
1969.09.17
申请号
ZM19690000028
申请日期
1969.02.27
申请人
AIR FILTER DEV BETH AND CO LTD
发明人
分类号
E03B;(IPC1-7):E03B/
主分类号
E03B
代理机构
代理人
主权项
地址
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