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	motor siren 2008-01-23 Small Industrial Motor Alarm is an omnidirectional siren,which are mainly used in Various industrial environments,such as factory buildings,workshops,warehouses,mining industry,etc The character of siren list as follow: 1.Power arbitrary choices: (cell or battery) DC 12 V, 24V, 48V, the exchange of 110 V, 120V, 220V 2. High frequency; 700 Hz - 1700Hz alarm sound very easy to distinguish between noise and...

	electrical siren 2008-01-23 Large Electromechanical Motor Sirens, which can be used in warning systems for air defence, fire warning, flood warning or other dangerous and emergency situation in cities, industrial area, residential area, military bases, airports, seaports, reservoirs, large factories, etc...

	siren 2008-01-23 Hand operated alarm is an audible warning device in order to indicate a dangerous or emergency situation and designed to provide effective warning in applications where there is no power supply ,such as:Civil defence. Camp sites. Mountain rescue. Frontier sentry and coast guard warning. Due to lightweight thesirens can be easily transported to remote locations and folded up to a small size for easy of...