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发明名称
Improvements relating to prepayment mechanism for gas meters
摘要
申请公布号
GB457790(A)
申请公布日期
1936.12.07
申请号
GB19350016331
申请日期
1935.06.05
申请人
ARTHUR COE
发明人
分类号
G07F15/06
主分类号
G07F15/06
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