Teaching Hermetic Compressors to Young Students

[Jfk1]

Years ago we had a machine in South America that was made in the United States that enabled us to cut open a hermetically sealed compressor and then to re-weld it . It looked like a small hand operated sand-blasting machine for cleaning parts.
These compressors were used for training in an HVAC school. Does anyone know if these machines are still manufactured and by whom?

Thanks,
Joe

Teaching Kids a Great Profession