... It can weld surfaces via media such as water and oil.10,It has a practical welding ... a kind of safe weld methoTechnique :(20K ultrasonic welder machine)ModelLK-2022LK-2022LK-2022LK-2022LK-2022Power900W1200W1500W1800W2000WFrequency20KHZVoltage220VMax Power1 ... , radiator , tanks,pallet plates. Plastic electronics: prepaid water meters, communications equipment, atheism phone, mobile phone accessories, ...