1/12 Scale Hot Air Pumping Engine Model Water-cooled Stirling External Combustion Engine Mechanical Toy Set
$469.99
RETROL R01 1/12 Scale Hot Air Pumping Engine Model Water-cooled Stirling External Combustion Engine Mechanical Toy SetFeatures:.Scientific and Educational Value: The 1/12 scale Hot air pumping engine belongs to the closed-cycle engine model, the category of external combustion engines, widely used in various places suc