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发明名称
Demand metering apparatus
摘要
申请公布号
US2923886(A)
申请公布日期
1960.02.02
申请号
US19570653572
申请日期
1957.04.18
申请人
LANDIS & GYR A.G.
发明人
WIDMER ERNST
分类号
G01R11/60
主分类号
G01R11/60
代理机构
代理人
主权项
地址
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