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Colorful LED Stirling Engine Model - Hot Air Electricity Generator Educational Toy
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TOYAN FS-V800WGPC 28cc V8 Engine Model Kit - Build Your Own Functional Gasoline Engine
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ENJOMOR LED Display Hot Air Stirling Engine Generator with Diamond Gear Drive - Educational Science Model
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Hydrogen and Oxygen Separated Water Electrolysis Generator - Educational Lab Equipment
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3D Metal Puzzle Swinging Santa Claus Model with Colorful Lights - DIY Christmas Assembly Kit for Kids and Adults - 100+ Pieces
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Innovative Mini Three-Stroke Gasoline/Kerosene/Methanol Engine Model for Educational Play
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16-Cylinder Stirling Engine Model Kit - Ultimate DIY Engineering Gift
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Mini Beta Hot Air Stirling Engine Educational Model - External Combustion Mechanical Toy
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PT6A Turboprop Engine DIY Model Kit - Interactive 3D Printed Aircraft Engine Assembly
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36cc DOHC Inline 4-cylinder Water-cooled Gas Engine for RC Model Vehicles, Boats, Tanks, and Airplanes
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Retro Film Projector Stirling Engine Model - DIY Assembly External Combustion Engine with Elegant Metal Base, Ideal Gift for Science Enthusiasts
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H74 Vintage 5CC Dual-Cylinder 4-Stroke Water-Cooled Gasoline Engine Model - DIY Mechanical Craft
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High-Performance Water-Cooled Hit & Miss Internal Combustion Engine Model 6000RPM
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CISON FL4-175 17.5cc Inline 4-Cylinder 4-Stroke Water-Cooled Gas Engine for RC Vehicles and Aircraft
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CISON FG-VT9 V-Twin 9cc 4-Stroke Air-Cooled RC Gasoline Engine with Original Parts
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Metal Rail Track Kit for DIY Steam Train Engine Assembly - 60cm Length
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