The major advanced technology components of HF series, ZGF series of DC high voltage testers equi-pment are made from the United States, Germany, Japan and other countries so that the equipments beco-me more reliable and more stable.So it makes the live operation tests easy by that the Voltage Multiplier has smaller volume and larger capacity and stronger over loading capability. We judge the quality of products andour credit standing as the life of man and constantly improve the technological level of development to produce high quality products to meet the needs of users.