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得力小学四年级科学实验套装上下册电路物理实验器材电力实验盒
[fourth grade standard model] 52-piece set (full set of primary school textbooks)/special offer⭐battery delivery(【四年级标准款】52件套（小学课本全套）/特价⭐送电池)
[fourth-grade upgrade] 61-piece set (full set of primary school textbooks + small upgrade early development) with battery❤(【四年级升级款】61件套（小学课本全套＋小升初拓展）送电池❤)
[genoptics aura essence experiment basic edition] 19-piece set (textbook synchronization experiment) with battery(【小灯泡实验基础版】19件套（课本同步实验）送电池)
| 默认 | USD $9.11 | 4889 piece available |
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| 默认 | USD $12.62 | 4762 piece available |
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| 默认 | USD $5.22 | 4968 piece available |
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