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Gym Multiple Zone Multiple Music System
Features:Scheduled Playback: Automatically play opening and closing chimes, safe
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Non-sensory Teaching Sound Reinforcement System
BackgroundOne new policy from the Chinese Ministry of Education has been clearly
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4” Two Way Frameless Ceiling Speaker with Fire Dome CSK-430HM
Features:Commercial ceiling speaker with 100V/70V transformerBuilt-in 100V/70V t
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