... rate tin welding bar for PCB board1:good humidity,bright beautiful,fast 2: ... RMA grade of GB-T3131-2001.Waving soldering wire:Good humidity, bright soldering point, beautiful, fast, no ... : spraying brush, clean till no remains on PCB soldering side with deionisation liquid or distilled water ... -60).2: ultrasonic cleaning, fast and good effect if cleaning PCB soldering side on surface of ultrasonic liquid ...