Добро пожаловать.~YIWU DONGQING IMP&EXP CO.,LIMITED
Выбор языка：
∷
∷
∷
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.
联系人：Jason
手机：+ 86 15314959887
电话：+ 86 13362968680
邮箱：42303348@qq.com
地址： No.508, Xicheng Road, Chengxi Street, Yiwu,Zhejiang,China
