Waihangahia he putanga matatini ake o tenei rerenga I whakaarohia hoki ka taea te whakamahi i te whakawhiti wera tuarua i runga i te miihini miihini hau, ka penapena i tetahi atu 30%.
Ko te tikanga, ko te putanga matatini ake o te rerenga ko "I whakaaro ano hoki ka taea te whakamahi i te whakawhiti wera tuarua i runga i te kaihanga hau ano, te whakaiti i te whakamahinga o te hinu ki te haurua, me te hanga i te rite ki te miihini penehini taketake. "