purpose of the roles is to complete the maintenance and repair of mechanical , electrical and electronic equipment , systems and general facilities .
O O O O O O 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 I-SKILL I-SKILL O
NN IN DT NNS VBZ TO VB DT NN CC NN IN JJ , JJ CC JJ NN , NNS CC JJ NNS .