It looks like all of these have a bulge on the top and obviously the reddish corrosion on top. I read up a little about this problem but I wanted a more professional view.
Ranking | Name | Answers |
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1 | PCBWay Team | 10 |
2 | Marcell Feher | 2 |
3 | Engineer | 1 |
4 | Brandon Weatherly | 1 |
5 | Rayan Bayan | 1 |