| 摘要 |
FIELD: non-destructive control. ^ SUBSTANCE: device has plate with aperture and bushing in it of same material. Engagement between plate and bushing forms a surface defect. Aperture in plate may be through or dead-end. Aperture in bushing may be made at angle or in parallel to sample surface. ^ EFFECT: broader functional capabilities. ^ 3 cl, 4 dwg |
