AMOC Stirling Engine Model, TECHING 219Pcs 3D Metal DIY Pumping Unit Assembly Model Kits, Mechanical Educational Toys for Kids Adults, (847YB751B16A)

Metal: Made of metal material, CNC process precision casting, aluminum alloy oxidized color, real machine workmanship at the level of collection crafts. Mechanical: The mechanical structure is Classically presented, and the clear transmission process is clear at a glance, showing the beauty of the meticulous logic and powerful machinery. Reality: Design prototypes based on historical classic inventions and products, presenting the core principles of machine operation, and intuitively showing the application value of the machine. Classic: Product design is inspired by representative and nodal classic creations in the history of human industrial science and technology. Excellent works are modeled on a scale and highly restored. Age: Over 8 years old.