Rong Zhong electric Limited by Share Ltd

Practical patent certificate (switch valve insulation valve structure)

Certificate of utility model patent (low voltage lead with rectifier transformer)

Certificate of utility model patent (a 20KV grade environmental protection dry type transformer)

Practical patent certificate (improved structure of low voltage winding for oil immersed transformer)

Certificate of utility model patent (an environmentally friendly dry type transformer)

Certificate of patent for utility model (a high voltage lead of rectifier transformer)