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发明名称
Lubricating device for gas meters
摘要
申请公布号
US2770970(A)
申请公布日期
1956.11.20
申请号
US19530366589
申请日期
1953.07.07
申请人
KENETH ROBERT MARSDEN
发明人
WUSTEFELD HEINRICH
分类号
F16N7/02;G01F15/00
主分类号
F16N7/02
代理机构
代理人
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