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发明名称
Improvements in and relating to acoustically controlled alarm installations
摘要
申请公布号
GB428973(A)
申请公布日期
1935.05.22
申请号
GB19340015427
申请日期
1934.05.23
申请人
SIEMENS & HALSKE AKTIENGESELLSCHAFT
发明人
分类号
F02B71/04;G08B13/16
主分类号
F02B71/04
代理机构
代理人
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地址
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