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Solder Flags
The solder flags shown in this example are probably due to inconsistent fluxing which should be visible on other areas of the board. The length of the pins is also excessive lead length which should not exceed 1.5-2.0mm below the level of the board. Shorting can also occure during exit from the back of the wave. If the component leads are dragged through the wave oxide layer rather the exiting from a clean surface.