NBSL, an elevator manufacturer, completed the investment in Prisma, a global manufacturer and supplier of automatic doors for elevators. Financial terms were not disclosed. "We are excited for the acquisition of Prisma, a company with a long history and a formidable know-out in the automatic doors business. We see this acquisition as one of the pillars of our Global presence strategy and we are confident their engineering expertise will be a positive contribution to NBSL, as we work to grow our business internationally," Lu Feng, NBSL President.