DISASTER PREVENTION BOARD FOR TUNNEL

PURPOSE:To provide the disaster prevention board for tunnel which easily executes the detector test according to each type in accordance with user's request in the case of a timer as well as the signal from a central disaster prevention board and arbitrarily changes the test start time in the c...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	ISHII KENJI, SHINO TOSHIHIKO
Format:	Patent
Sprache:	eng
Schlagworte:	ALARM SYSTEMS EARTH DRILLING FIXED CONSTRUCTIONS MINING ORDER TELEGRAPHS PHYSICS SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, ORDRAINING IN OR OF MINES OR TUNNELS SIGNALLING SIGNALLING OR CALLING SYSTEMS
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