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发明名称
POSITIVE DISPLACEMENT DEVICE
摘要
申请公布号
GB9000753(D0)
申请公布日期
1990.03.14
申请号
GB19900000753
申请日期
1990.01.12
申请人
HARPER, ALAN
发明人
分类号
B01F15/04;B67D1/04
主分类号
B01F15/04
代理机构
代理人
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