Fitted wear protective covers, specially adapted for use in relation to briquetting, compaction and comminution machines; stud-shaped metallic and non-metallic protective linings, specially adapted for affixing to briquetting, compaction and comminution machines and machine parts; rollers being machine parts for use in relation to rolling presses being machines; machine parts, namely, rollers plated against wear; machine parts, namely, wear-armored plates for the lining of roller presses bein...