<transcript><audio_47>through a casting now there were two different ways to handle it you could go straight through the casting to see if there was an interruption but typically we used what was called the bounce back method where it would go down uh it would go through the metal to the far</transcript><transcript><audio_48>wall and then bounce back um uh to the the instrument that we used to put the sound through and if it went down and bounced back through hey the the casting was solid if it went down and there were breaks in the return of the sound you</transcript><transcript><audio_49>knew that there was something in there and you didn't always it was really tricky to try to figure out just how deep it was in the casting and to go in and get it but anyway and then we also utilized x-rays uh we would x-ray a</transcript> through a casting now there were two different ways to handle it you could go straight through the casting to see if there was an interruption but typically we used what was called the bounce back method where it would go down uh it would go through the metal to the far wall and then bounce back um uh to the the instrument that we used to put the sound through and if it went down and bounced back through hey the the casting was solid if it went down and there were breaks in the return of the sound you knew that there was something in there and you didn't always it was really tricky to try to figure out just how deep it was in the casting and to go in and get it but anyway and then we also utilized x-rays uh we would x-ray a
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