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发明名称
Draft control
摘要
申请公布号
US2222502(A)
申请公布日期
1940.11.19
申请号
US19400332672
申请日期
1940.05.01
申请人
BERTRAM BERT C
发明人
BERTRAM BERT C.
分类号
F23L17/16
主分类号
F23L17/16
代理机构
代理人
主权项
地址
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