VIDEO-AUDIO CONTROLLER
Disclosed is a video-audio controller, comprising an earplug head clamp made of metal or chemical fiber material and a tray supporting column connected with a flattened shape rib. The video-audio controller is suitable for the primary and middle school students and adults while learning, writing and...
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Format: | Patent |
Sprache: | eng |
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Zusammenfassung: | Disclosed is a video-audio controller, comprising an earplug head clamp made of metal or chemical fiber material and a tray supporting column connected with a flattened shape rib. The video-audio controller is suitable for the primary and middle school students and adults while learning, writing and reading. |
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