Motheong oa netefatso ea boleng, SPL, joalo ka moetsi le morekisi oa li-transformer tsa China, e ka fana ka li-transformer tse theko e tlase joalo ka li-transformer tsa motlakase oa oli, li-epoxy resin cast mofuta o omileng oa motlakase, li-substations tse tlase, li-switchgear tse tlase le lihlahisoa tse ling tse ikhethileng. Hape re ka fana ka lits’ebeletso tsa thomello ea kantle ho naha, ho sa tsotelehe hore na o hokae.