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发明名称
Chimney construction
摘要
申请公布号
US2455570(A)
申请公布日期
1948.12.07
申请号
US19460666388
申请日期
1946.05.01
申请人
DROEGER CARL C
发明人
DROEGER CARL C.
分类号
E04F17/02
主分类号
E04F17/02
代理机构
代理人
主权项
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