Welcome: YIWU DONGQING IMP&EXP CO.,LIMITED
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The set should include: 1. black balls – 14 pcs., 2. connecting tubes – 16 pcs., 3. operating instructions – 1 pc. The demonstration aid should be a model consisting of black balls representing atoms and connecting tubes representing bonds.
Contact: RuoTian.Zhong
Phone: + 86 15314959887
Tel: + 86 13362968680
Email: 42303348@qq.com
Add: Guangdong guangzhou tianhe balance sand too road sand road
