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5 dry battery into the battery clip on the bottom plate)
finally make the friction to be even bigger
superior quality
and DIY enthusiasts
There are skills in using the product
STEM Hot Air Engine Model Educational Toy Kits with Generator and LED Bulb Type_DIY Stirling Engine 5 dry battery into theSTEM Hot Air Engine Model Educational Toy Kits with Generator and LED Bulb Features: . Beautiful Appearance: the body is made of fine metal polished and polished. The surface is smooth and bright, emitting silver light, not easy to rust and fade. It looks very mechanical and technical. It realizes the combination of texture and beauty. . Superior Performance: solid and strong. The high temperature resistant glass heating tube can be operated at high
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