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发明名称
EXCHANGER
摘要
申请公布号
PL264242(A1)
申请公布日期
1988.10.27
申请号
PL19870264242
申请日期
1987.02.19
申请人
发明人
分类号
F24D;F24F;F28D;(IPC1-7):F28D/;F24D/;F24F/
主分类号
F24D
代理机构
代理人
主权项
地址
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