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发明名称
Improvements relating to drain pipes
摘要
申请公布号
GB362602(A)
申请公布日期
1931.12.10
申请号
GB19300031740
申请日期
1930.10.22
申请人
DOUGLAS WHITAKER
发明人
分类号
E02B11/00
主分类号
E02B11/00
代理机构
代理人
主权项
地址
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