Handheld Ultrasonic Welding Machine power:300w frequency:35khz weight:14KG Digital Ultrasonic Generator Applications:Mainly ultrasonic welding, ... -quality automatic shocks constant balanced line, auto-recovery function of frequency. 4, Japan, Matsushita were sector interface, PLC control, control the ... right to modify the design and parameter without prior notice Hand held Ultrasonic Welding Machine