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发明名称
Grate structure
摘要
申请公布号
US1803327(A)
申请公布日期
1931.05.05
申请号
US19290363971
申请日期
1929.05.17
申请人
GIBSON JOHN G
发明人
GIBSON JOHN G.
分类号
F23H3/02
主分类号
F23H3/02
代理机构
代理人
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