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发明名称
Improvements in indicating systems
摘要
申请公布号
GB330497(A)
申请公布日期
1930.05.29
申请号
GB19280035247
申请日期
1928.11.29
申请人
FRANK MERRILL SLOUGH
发明人
分类号
G01F23/18
主分类号
G01F23/18
代理机构
代理人
主权项
地址
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