... more stability; 2. Anti-backwards body and coaxial direct pressure design, make pressure exerted more evenly, higher welding precision;3. ... . Alloy mould, sturdy and durable, not to wear;7. Unique design of level screw, mould is easier to debug;8. Limitation ... the finished products not overflow;9. Smart structure, reasonable design and beautiful appearance.Working Detail of ultrasonic welding machine:1 ...