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发明名称
Improvements in bell ringing apparatus
摘要
申请公布号
GB633025(A)
申请公布日期
1949.12.05
申请号
GB19470023867
申请日期
1947.08.28
申请人
GILLETT AND JOHNSTON LIMITED;ROBERT FLETCHER ASTON HOUSMAN
发明人
分类号
G10K1/34
主分类号
G10K1/34
代理机构
代理人
主权项
地址
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