query hangzhou feiyue instrument co., ltd. specializes in the production, research and development and sales of laboratory sample equipment. its products include: intelligent integrated distillation instrument, ammonia nitrogen distillation device, laboratory distillation instrument, volatile phenol distillation device and other experimental equipment. it has a professional technical team and high-quality service, providing customers with high-quality products. consultation hotline: 0731-88288674. 2 shanghai yijue mechanical and electrical equipment co., ltd. 50 beijing