battery box （separate type） no. 1 battery series parallel physical and electrical experiment teaching instrument_青华科教仪器有限公司

battery box （separate type） no. 1 battery series parallel physical and electrical experiment teaching instrument

battery box （separate type） no. 1 battery series parallel physical and electrical experiment teaching instrument

电池盒（分离式)1号电池串联并联物理电学实验教学仪器

10 piece

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