00269nam a2200109Ia 4500008004100000041000800041082001900049100001200068245003800080260003300118300000800151211209s1976    xx            000 0 und d  aeng  a671.52 N76 SAC  aSACKS R  aWELDING PRINCIPLES AND PRACTICES   bCHAS A BENNETT COMPANYc1976  a992