1. Makampani opanga magalimoto: NBR O-mphete amagwiritsidwa ntchito pamagalimoto osiyanasiyana monga mafuta, ma hydraulic systems, ndi braking systems.
2. Makampani opanga ndege: NBR O-mphete amagwiritsidwa ntchito m'makampani opanga ndege kuti agwiritse ntchito monga mafuta, ma hydraulic systems, ndi pneumatic systems.
3. Makampani amafuta ndi gasi: NBR O-mphete amagwiritsidwa ntchito kwambiri m'makampani amafuta ndi gasi pakugwiritsa ntchito monga mapaipi osindikizira, ma valve, ndi mapampu.