Single-Cylinder Four-Stroke Gasoline Internal Combustion Engine Model Teaching Instrument STEM Educational Toy
$99.99
J31008 Single-Cylinder Four-Stroke Gasoline Internal Combustion Engine Teaching Model Experimental Instrument STEM ToyFeatures:.This novel and unique engine model is finely crafted, of reliable quality, allowing for a clear observation of the operation process..Usage: Connect the power supply and slowly turn the handle