Imakethe yomhlaba wonke yezinhlelo eziyisisekelo iyaqhubeka nokuvela, abakhiqizi belwela ukuletha izixazululo ezisezingeni eliphakeme. Phakathi kwabaholi kulo mkhakha, izinkampani ezinhlanu zigqama ngeminikelo yazo eyingqayizivele: Harger Lightning & Grounding, nVent ERICO, Galvan Industries, Allied, kanye ne-LH.
Funda kabanzi 
