1. It also does specialized metal working for more than 300 other companies. 2. It is believed he converted the machinery for use in metal working . 3. GLARE parts are constructed and repaired using mostly conventional metal working techniques. 4. In 1941, the patented Kaell-Kjellberg-Lundin method considerably improved the efficiency of metal working . 5. Around 57 % of the total industrial production is metallurgy and metal working . 6. Around 2400 BC metal working made its first appearance in Ireland. 7. Metal working machineries 4902 3758 30.4 9 . Telecommunications & sound8. Ammonium sulfite can be included in lubricants for cold metal working . 9. The group manufactures products for thermal metal working ( welding, plasma cutting ). 10. With the arrival of metal working , the first urban settlements made their appearance.