PRAQ S.A

Our factory, with the direct assistance of the Department of Chemistry at Zhengzhou University, adopted a new process to produce high-efficiency desulfurization activated carbon in 1986. Since its establishment, our factory has always adhered to the

Shenzhen Ruisiyuan Technology Co., Ltd. is dedicated to providing electronic product testing instruments, meters, and weighing system solutions, as well as solid and liquid specific gravity/density weighing solutions. It is a company that integrates