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Application filed by 竹中エンジニアリング工業株式会社filedCritical竹中エンジニアリング工業株式会社
Priority to JP1987174152UpriorityCriticalpatent/JPH06792Y2/ja
Publication of JPH0177977UpublicationCriticalpatent/JPH0177977U/ja
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Publication of JPH06792Y2publicationCriticalpatent/JPH06792Y2/ja
Intrusion alarm system for buildings utilizing the building structure as a communications path for alarm signals or for security system activation signals