Ningbo Kelsun Int'l Trade Co., Ltd. is a professional manufacturer and distributor of science & educational apparatuses for primary schools, middle colleges universities. As company with product range covering physics appa., chemical biology ...

Shandong Yuanda Net & Multimedia Ltd. mainly engages in the production and sales of digital information laboratory systems with a strong technical R&D center under cooperation Shanghai Education Commission. With wide range, good quality reasonable ...