pūtēte pūwai mō te kīwha
Nā ngā rautaki whakanui pūtahi hei hoko i te whenua kua hangaia hei mea matua mō te ao o te whakanui, e hanga ana ki te tuku pai rawa i ngā āhuatanga katoa o ngā whenua rerekē. E ai ki ngā rautaki matatau nei, e mau ana ngā momo matāwhero hou me ngā hoahoa pūnengi e waihanga ana i te hiahia ki te tuku pai rawa ki roto i ngā kōwhatu, ngā one, ā, ngā momo whenua rerekē kē. Kāore i te whakaritea ngā rautaki i runga i ngā tohu iti, ina he rautaki pūtahi konae, rautaki PDC (Polycrystalline Diamond Compact), ā, rautaki kō whatu, kāore i te whakariteritea i aua rautaki mo ngā āhuatanga rerekē kē o te whakanui me ngā huringa. Nō ngā rautaki whakanui pūtahi hou nei nō ngā momo hanga hou, pēnei i ngā whakapuaki matāwhero, ngā whakahaere wai hou hei whakapai i te whakamahi, ā, ngā whakahaere pa tuawhenua whakapai. I hangaia ngā rautaki i runga i ngā momo matāwhero rangatira e tiakina ana te whanonga me te roa, āe kāore i te mōhiohia ngā taiao whakanuitanga kē. Ka whai mana ngā rautaki i runga i ngā whakamahi katoa, pēnei i te whakanui pūwai, te whakamahi matauranga, te tirohanga geotekina, ā, te whakahau i te wai me te ngahere. I taurunga pūnui ngā whatu whakanuitanga hei whakapai i te hīkoi whakanui, ā, hei whakaheke i te whanonga me te whakapae, ka puta he oranga roa i te oranga o te rautaki me te whakaiti i ngā utu mahi. Hei whakapai anō hoki ngā whakahaere ā-papa me ngā kākano hei tiakina mai i te whakapae me te whakaputu, e tiakina ana te whanonga pai tonu i runga i te oranga o te rautaki.