1. Hexagon Flange Bolt view the solder joints. The LED lanterns produced by conventional LED lantern manufacturers adopt SMT SMT process, solder paste and reflow soldering process. Therefore, the solder joints on the LED lantern are relatively lubricated, and the amount of solder is not too much. The solder joints are curved. From the beginning, the structure of the maintenance layer should pay attention to tightness and small pores.



2. The maintenance layer is evenly distributed and has a certain thickness.



3. The maintenance layer of Threaded Rods And Eye Bolts is firmly separated from the base metal and has good adhesion.