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2 wheel smart robot car chassis kit and dupont wire connector kit..
      
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      Features: Color:Red and Blue Material:Plastic Number of Vane:4 blade  Blade width:31.2mm/1.23 inch A..
      
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      NUOBESTY Kids DNA Model Kit Genes DNA Models Double Helix Science Popularization Teaching Aids
MM4443DescriptionIt is a DIY double helix model and it can exercise your children practical ability, as we..
      
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      Specification:  Condition: Brand New  Item Type: Stirling Engine    Material: Stainless Steel  Colo..
      
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      Specification:Condition: 100% Brand NewItem Type: Stirling EngineMaterial: Stainless SteelPackage Li..
      
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      Features:  MODEL: QZ08A Net Weight: 100 g / 0.22 lb Size: 6 cm diameter * 6 cm height / 2.36 in diam..
      
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      This model can clearly show the trajectory of valve and piston, and help students understand the int..
      
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