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发明名称
ELECTRICALLY OPERATED SIGNALLING SYSTEMS
摘要
申请公布号
CA581057(A)
申请公布日期
1959.08.11
申请号
CAD581057
申请日期
申请人
HUGH WOOD AND COMPANY LIMITED
发明人
GEORGE DENHOLM;LEONARD A. NORDMANN
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主分类号
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