English: This image shows metallographic polishing equipment used during material sample preparation. In metallography, polishing is performed after sectioning and grinding to improve surface quality and produce a flat, deformation-free surface suitable for microscopic examination. Optimizing polishing parameters such as pressure, speed, abrasive type, and lubrication helps reduce surface defects and improve analysis accuracy in materials research and quality control laboratories. Source: https://ukam.com/improve-sample-quality-optimize-your-polishing-operating-for-metallography-sample-preparation/