have been sandblasting
Present perfect progressive conjugation of sandblast. There are other translations for this conjugation.

sandblast

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500+ learners.
The man was a sandblaster at a metal preparation shop and was reported to have been sandblasting for 10 years, possibly without adequate respiratory protection.
El hombre era un operario de limpieza a chorro de arena en un taller de preparación de metales y se declaró que había estado realizando operaciones de limpieza abrasiva por 10 años, posiblemente sin protección respiratoria adecuada.
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