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发明名称
Improvements in or relating to bowls for chimneys and ventilation shafts
摘要
申请公布号
GB875989(A)
申请公布日期
1961.08.30
申请号
GB19570039818
申请日期
1957.12.23
申请人
CLIFFORD EDMUND BREWER
发明人
分类号
F23L17/12
主分类号
F23L17/12
代理机构
代理人
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地址
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