Recess wall surface finishing device has lance with deformation at end for mechanical treatment of wall surface

摘要

The finishing device (1) has a tubular lance (8) supplied with high-pressure fluid which goes out through an outlet aperture (10). In the front end sector (11), there is a deformation (12) opposite the outlet aperture, with a cutting edge pressed against the wall surface (2), making it much easier to give a good finish to complex shapes.