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发明名称
Signalling system
摘要
申请公布号
US2724102(A)
申请公布日期
1955.11.15
申请号
US19530387769
申请日期
1953.10.22
申请人
HOLLINS JESSE R
发明人
HOLLINS JESSE R.
分类号
B60Q1/38;B60Q1/44
主分类号
B60Q1/38
代理机构
代理人
主权项
地址
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