| 摘要 |
A self-contained device (10) is disclosed for directing a fluid stream containing particulate matter against a surface (T) to abrade, etch, erase, cut, smooth, clean, polish, and harden the surface (T). In the preferred embodiments of the invention, the particulate matter (M) is contained within the device (10) and a carrier fluid (A), under pressure, introduced therein and mixes with the particles to produce a fluid stream that can be delivered to a target surface (T). the device can be powered and/or energized by a source of compressed gas which is coupled to the device through a fixture designed for that purpose. The invention also includes a method for delivery of a particle stream, under pressure, to a target surface, and, to the selective modification of the target surface depending upon the hardness of the particle, the velocity of impact thereof and the extend of the exposure of the target surface to the particle stream.
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