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Turning Fork for Education - Education is simple and convenient. You just need to tap lightly, then the sound will come out. It is very simple and practical. Tuning Fork for Experiment - Designed for physics experiments, to teach experiments, they can be created inside each other or adjusted to fit each other. Reaction Instruction - With this, you will have the best experience and it will be the time when you want to relax. Experience Turning Fork Set - With this, you will have the best experience and it will be the time when you want to relax. Tuning Fork for Experiment - It can also be used as a practical test tool for physical acoustic experiments, very practical and professional.