00325    a2200121   450000100040000000500170000408200250002110000180004624500840006426400280014830000190017652600080019553420260413115316.0  aCD 671.52 S5552 20191 a3G E-Learning  aShielded metal arc welding:bExpert (In compliance with NC IV) /c3G E-Learning 1a b3G E-Learning;c2019  a1 Compact disc  aNPM