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发明名称
Proportioning and metering apparatus
摘要
申请公布号
US1862643(A)
申请公布日期
1932.06.14
申请号
US19310540676
申请日期
1931.05.28
申请人
DONALD WELLS HAROLD
发明人
WELLS HAROLD DONALD
分类号
D21F1/06
主分类号
D21F1/06
代理机构
代理人
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地址
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