He taputapu haumaru te parepare e mimiti ana, e whakaiti ana i te pānga o waho, ā, e tiaki ana i te mua me te tuara o te tinana o te motuka. E rua tekau tau ki muri, ko ngā parepare o mua me muri o ngā motuka he mea hanga ki ngā rauemi whakarewa. I tāia ki roto i te maitai hongere āhua-U, neke atu i te 3 mm te matotoru, ā, i pania te mata ki te chromium. I herea, i whakapirihia rānei ki te kurupae roa o te anga, ā, he āputa nui ki te tinana, me te mea he wāhanga piri. I te whanaketanga o te umanga motuka, kei te ara auaha hoki te parepare motuka hei taputapu haumaru nui. I tua atu i te pupuri i te mahi tiaki taketake, ko ngā parepare o mua me muri o te motuka o ēnei rā, me te whai i te rangimarie me te kotahitanga ki te āhua o te tinana, me te whai i tōna ake mama. Hei whakatutuki i tēnei kaupapa, he mea hanga ngā parepare o mua me muri o ngā motuka ki te kirihou, e mōhiotia ana ko ngā parepare kirihou. E toru ngā wāhanga o te parepare kirihou: te pereti o waho, te rauemi whakaruru me te kurupae. He kirihou te pereti o waho me te rauemi ārai, ā, he pepa hurihuri matao te kurupae, tata ki te 1.5 mm te matotoru, ā, he rite ki te awaawa āhua-U; ka piri te pereti o waho me te rauemi whakakī ki te kurupae, ka piri ki ngā tīwiri o te anga, ā, ka taea te tango i ngā wā katoa. Ka whakamahia e tēnei parepare kirihou te kirihou, e rua ngā momo rauemi e whakamahia ana, ko te polyester me te polypropylene, mā te whakamahi i te tikanga werohanga. He momo kirihou anō hoki e kiia nei ko te raupapa polycarbon ester kei waho, e uru ana ki roto i te hanganga koranu, ko te tikanga werohanga koranu, ko te tukatuka i waho o te parepare ehara i te mea he pakari teitei te kaha, engari he painga anō hoki o te whakarewa, ā, he pai te mahi paninga, he nui ake te maha o ngā mea kei roto i te motuka. He kaha, he pakari, he whakapaipai hoki te parepare kirihou, mai i te tirohanga haumaru, ka taea e te aituā tukinga motuka te mahi ārai, te tiaki i te tinana o mua me muri o te motuka, mai i te tirohanga āhua, ka taea te whakakotahi maori me te tinana i roto i te wahi, te katoa, he whakapaipai pai, ka noho hei wāhanga nui o te āhua whakapaipai motuka.
