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经营范围
发明名称
Loop detectors
摘要
申请公布号
GB2074813(A)
申请公布日期
1981.11.04
申请号
GB19800012962
申请日期
1980.04.19
申请人
PLESSEY CO LTD
发明人
分类号
H04Q1/38;(IPC1-7):H04M3/22
主分类号
H04Q1/38
代理机构
代理人
主权项
地址
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