| 摘要 |
<p>A workpiece (10) includes a surface (18) adjoining an aperture (12). The aperture is filled with a plug (24) to provide a step (26) adjoining the surface. A stream of pliant shot (28) in a carrier fluid (30) is discharged at a shallow angle of incidence (A) against the plug and directed toward the step for selective abrasion thereof. <IMAGE></p> |
