;
Waehere whakaoho SPM 19, 20.
He nui rawa te ngaohiko o te wahanga U (waehere whakaoho 19) me te wahanga V (waehere whakaoho 20).
Ina puta he whakaoho, whakakapia te SPM.Ina katahi ano ka whakakapihia te papa taiawhio mana SPM, tena koa whakauhia te whakaurunga o te hononga i waenga i te wae hiko me te papa taiawhio mana SPM.
Arotahi ki te whakarato otinga mong pu mo te 5 tau.