00318nam a2200121Ia 4500008004100000041001200041082001800053100001700071245003800088260003500126300001200161650002300173231217s9999    xx            000 0 und d  aEnglish  a671.52  KHA;6  aKhanna, O P. 2aA text book of welding technology  c1996bNew Delhi : Dhanpat Rai,  axvi+949  aWelding technology