Mīhini hurihuri roera rapa e rua ngā tuaka

He mīhini takai pereti tuaka-rua aunoa tēnei mīhini, e whakamahia ana i roto i te tukanga whakahaere piko. I te pāmahana rūma, ka taea te huri i te mīhini takai pereti kia rite ki te āhua porotaka, ka werohia te pereti porowhita - kōhao porowhita - pewa wāhanga.

Ka hikitia te takai o runga e te motuka mā roto i te whakaheke, te pou tuku, te taputapu kutukutu me te takirua kutukutu, ka whakawhiti mana te takirua nati tīwiri, ka piko te pereti maitai. Ka hurihia te pereti koiri mā roto i te motuka matua mā roto i te whakaheke matua, ka huri te roera taraiwa taputapu tuwhera, ka noho hei roera taraiwa ina hurihia te pereti. Nā te mea kāore i rerekē te teitei o te roera o raro, he ngawari ki te whāngai me te whakahaere. He taputapu whānui rawa, he taputapu matua mō te hanga poiha, te hanga kaipuke, te hinu matū, te sima, te hanga mīhini hiko. He painga o te taputapu ko te hanganga ngawari, te kiato, te whakahaere watea me te tino pai. Ko te rerekētanga porowhita o te hua he iti iho i te 0.5mm, ko te takai o raro o te mīhini takai he rango waipēhi, e kore e taea anake te whakarite i te tukanga nekehanga maeneene, engari he pēhanga pumau hoki i te wā o te tukanga takai, kia mau ai te tawhiti i waenga i te takai o raro me te takai o runga. I roto i te tukanga hanga hua katoa, ko te tohu whakarerekētanga rauemi o ia tawhiti menemene he iti iho i te 0.5mm.