... : 4.8 kW 4.ISO9001 NGM - 4.8 diesel rail grinding machine:1:patent2:ISO90013:Technical Applicable scopeNGM - 4.8 type internal ... rail grinding machine is suitable for 43 kg/m - 75 kg/m rail weld, uneven joint, rail side fat edge, rail surface welding ... repair parts, such as grinding. With high work efficiency, grinding of good quality, simple operation, and ...