With ultrasonic plastic welding, ultrasonicmetalwelding, resistance welding prototype and so on.
备有超声波塑料焊接，超声波金属焊接，电阻焊接样机等。
2
In particular, we in the field of ultrasonicmetalwelding achieved a major breakthrough, one to break Europe and the United States and other countries in the technical long-term monopoly.
特别是我们在超声波金属焊接领域所取得的重大突破，一举打破欧美等国在该技术上的长期垄断。
3
Ultrasonic defect detection inspection shall be carried out for welding seams and defects shall be removed. the excess weld metal of welding seam must be eradicated and abraded after welding.