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AOSHIKE 10Pcs 5V 30mA Mini Solar Panels for Solar Power Mini Solar Cells DIY Electric Toy Materials Photovoltaic Cells Solar DIY System Kits 2.08"x1.18"(5V 30mA 53mmx30mm)

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PUOSUO Hot Air Stirling Motor Power Generator Alpha Engine Model Educational Physics Experiment Kit(B)

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AOSHIKE 10Pcs 5V 30mA Mini Solar Panels for Solar Power Mini Solar Cells DIY Electric Toy Materials Photovoltaic Cells Solar DIY System Kits 2.08"x1.18"(5V 30mA 53mmx30mm)

PUOSUO Hot Air Stirling Motor Power Generator Alpha Engine Model Educational Physics Experiment Kit(B)

Amazon.com: Stirling Engine Model, Physics Science Single Cylinder Sterling Engine for Home : Toys & Games

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PUOSUO Hot Air Stirling Motor Power Generator Alpha Engine Model Educational Physics Experiment Kit(B)