| 摘要 |
This method consists in spraying onto the surface of the stone (4) to be engraved, particles of cast steel shot retaining an overall spherical shape during their entire period of use, having a Vickers hardness of the order of 460 to 550, the spraying of the particles being carried out at a speed of the order of 75 to 85 m/sec, and with an angle of incidence lying between 70@ and 90@. Application to the decoration of stone articles. <IMAGE>
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