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This ball features 90 facts and questions about alternative energy
Precise Composition: Contains HM infusion solids
enabling examination of inner structures
It can be used with all children who may have attention issues
Three-Phase AC/DC Dynamo Model This ball features 90 factsThree Phase AC DC Dynamo Model Premium Quality: Three Phase AC DC Dynamo Model is made of high quality, heavy duty and durable materials. Designed for use in professional laboratories but is an ideal choice for science classrooms and household use. If you need custom order with different sizes design, please contact us.
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