All Metal Assembly DIY Engine Model Pumping Unit Gift/Toy
- High-quality Metal Material: CNC process precision casting, aluminum alloy oxidized color, and real machine workmanship at the level of collection crafts.
- The mechanical structure is classically presented, with great teaching significance: the clear transmission process is clear at a glance.
- Show Historical Classics: Use historical classic inventions and products as design prototypes to present the core principles of machine operation and demonstrate the application value of machines.
- Highly Restored: Proportional modelling, highly restored.
- 219 Parts: exquisitely polished by a special abrasive tool, which interprets the wisdom creation and yearning for the era of big industry.
