| 摘要 |
A self-contained device is disclosed for directing a fluid stream containing particulate matter against a surface to abrade, etch, erase, cut, smooth, clean, polish and harden the surface. In tile preferred embodiments of the invention, the particulate matter is contained within the device and a carrier fluid, under pressure, introduced therein and mixes with the particles to produce a fluid stream that can be delivered to a target surface. 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 tile selective modification of tile target surface depending upon the hardness of the particle, the velocity of impact thereof and the extent of the exposure of the target surface to tile particle stream.
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