E rua nga tikanga whakamahana noa i roto i te pouara pouara CNC. Ko tetahi he whakamatao wai, ko tetahi he whakamatao hau. E ai ki o ratou ingoa, ka whakamahi te miro whakamatao i te hau ki te whakakore i te wera ka whakamahia e te miro whakamatao wai te tohanga wai hei tango i te wera mai i te miro. He aha taau e whiriwhiri? Ko tehea te mea pai ake?