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经营范围
发明名称
A radio-operated personnel calling device
摘要
申请公布号
GB1070187(A)
申请公布日期
1967.06.01
申请号
GB19640044986
申请日期
1964.11.04
申请人
CHARBONNAGES DE FRANCE
发明人
分类号
A42B3/30;E21F17/18;G08B5/22;H04B1/034;H04B1/38
主分类号
A42B3/30
代理机构
代理人
主权项
地址
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