ability to find and rectify earth faults as well as open and short circuit faults .
O O B-SKILL I-SKILL I-SKILL I-SKILL I-SKILL I-SKILL I-SKILL I-SKILL I-SKILL I-SKILL I-SKILL I-SKILL I-SKILL O
NN TO VB CC VB NN NNS RB RB IN JJ CC JJ NN NNS .