00274nam a2200109 a 4500008004100000050001500041100002600056245005200082250001200134260000900146350000900155120416s1971    xx |||||||||||||| ||    u  aTS 227 Dav  aDavies, Arthur Cyrill14aThe science and practice of welding. (5th ed. )  a5th ed.  c1971  a0.00