The welding accuracy is high. For complex PCBs, it adopts selective spraying and local peak heating technology. It only welds the designated soldering points area, which can perfectly adapt to high-density, fine-pitch, and irregularly shaped pins of components. It effectively avoids the defects such as continuous soldering, false soldering, and missed soldering in traditional wave soldering. It is especially suitable for PCB welding in high-reliability fields such as automotive electronics and industrial control.