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✅The robot car is a kind of educational mechanical, electronic and electromechanical control products. It can be widely used in schools to help
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LM393 comparing two photosensitive resistance, when the imbalance (eg side pressure runway black) immediately control side of the motor stops
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Features: 100% Brand new and high quality! This Internet Streaming/Media Centre TV Box is for you! Supports usual for Android apps so you can access
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