RETROL HM-01 Hit and Miss Stationary Engine Full Set with Transport Cart Frame SKU: 3481143 ×1Base Equipment Box + Fuel Tank + Oil Pipe Access...

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ENJOMOR Vintage Horizontal Gas Engine Model, Working 4-Stroke Internal Combustion Engine with Evaporative Water Cooling System, Metal STEM Mechanic...

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Inline 6-Cylinder Engine Model Kit, Transparent Internal Combustion Engine DIY Assembly Kit with Motor Drive, Moving Pistons and LED Effect, STEM M...

1/10 Scale Operational Turbofan Engine Model – Motorized Aircraft Turbo Engine with LED Tail Flame Light & Rotating Fan Display（Finished Model）...

ENJOMOR 3D Printed Radial Five-Cylinder Engine Model Kit, Mechanical DIY Assembly STEM Aviation Engine Display with LED Light Effect, Creative Desk...

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Stirling Engine RC Mecanum Wheel Vehicle with Crystal Cylinder, LCD Display - STEM Physics Model (Assembled) Features: Stirling Engine and Mecanum ...