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a relaxing stress relief physics toy for people in the office
Toyan Four-stroke Methanol FS-S100A Engine Set with Base Fuel Tank Battery Start ESC Hot Head Heat Head Cap Throttle Push Rod and Throttle Lever for 1:10 1:12 1:14 Car Ship Airplane Model
Mini Hot Air Stirling Engine Motor Model Electricity Generator Metal Base Physics Science Educational Toy
Package Dimensions: 17*12*12cm
The weight is 367g and the stroke is 15mm
1:2 Visible Flat Twin Airhead Engine Model Kit DIY Stem Engine Model Price_《$30 a relaxing stress relief physics1: 2 Visible Flat Twin Airhead Engine Model Kit DIY Stem Engine Model Features: . Beautiful appearance, transparent and visible, the finished product is realistic and full of mechanical sense. . The mechanical structure and internals of the horizontally opposed engine, the crankshaft, the pistons and the valves can be seen in the transparent casing, and the ignition spark is perfectly simulated. . Fun to Play: Contains more than 290 components,
