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The product is of linear function of tracking ,which can track their own self-identification of black line running along the black track, It adopted two infrared diode sensors sending signals to the ground and two receivers for color to identify routes, simple structure pleasing in appearance, clever design, lively and fun, so that students learn while playing, a real balance between education and fun This product is suitable for electronic amateur and school students for taking the electron elementary knowledge and practice as a learning tool for the use of welding assembly, Children's entertainment is a good toy. Besides the direct purchase end product, customers can choose to purchase sets of components, their assembly welding, making their own toys.  
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