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solid thermal expansion and contraction demonstration experiment primary school science physics experiment teaching aids thermal expansion and contraction experiment materials

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solid thermal expansion and contraction demonstration experiment primary school science physics experiment teaching aids thermal expansion and contraction experiment materials

固体热胀冷缩演示实验小学科学物理实验教具热胀冷缩实验材料

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Specifications	Price(RMB)	Stock	Quantity
[small three-piece set] thermal expansion and contraction(【小号三件套】热胀冷缩)	USD $1.3	999986 piece available
【大号两件套】热胀冷缩	USD $5.45	999837 piece available

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