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发明名称
Perfectionnements aux appareils servant à recueillir les poussières des machines à concréter
摘要
申请公布号
FR694883(A)
申请公布日期
1930.12.09
申请号
FRD694883
申请日期
1930.05.02
申请人
发明人
GREENAWALT JOHN ECKERT
分类号
B28C7/00
主分类号
B28C7/00
代理机构
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