high humidity and good flow rate tin welding bar for PCB board1:good humidity,bright beautiful,fast 2:and high isolation resist Shenzhen ... wires,tin ingots,anode stubs,soldering flux,apply machine water and cleaning agents.Our products are widely applicable to welding ... on PCB soldering side with deionisation liquid or distilled water (40-60).2: ultrasonic cleaning, fast and good effect if cleaning ...