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发明名称
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摘要
申请公布号
US1830967(A)
申请公布日期
1931.11.10
申请号
US19290334880
申请日期
1929.01.25
申请人
FRANKLIN ALBERT M
发明人
FRANKLIN ALBERT M.
分类号
F23Q2/52
主分类号
F23Q2/52
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