00330nam a2200133Ia 4500008004100000041001200041082001600053100001600069245003800085260002900123300001200152440000900164650002300173240126s9999    xx            000 0 und d  aEnglish  a671.52  KHA  aKhanna, O P 2aA text book of welding technology  bNew Delhi : Dhanpat Rai,  axvi+949  aNULL  aWelding technology