Puzzle

In non-destructive testing, as you may know, we mainly specialize in welding issues. However, it is not the case that we only deal with welds alone.Although screening castings with traditional radiography doesn't happen every day with us, and such large and impressive inconsistencies are rare, they always present an interesting challenge.

We have a little riddle for those working in the evaluation of radiographs - who among you can recognize what kind of inconsistency we are dealing with here?🔍.