He whānuitia te whakamahinga o te Koiri Ripanga Kowiri tira i roto i ngā ahumahi maha. BS Ka taea te hanga i te koiri kowiri tira me te taha haumaru, ka taea rānei te whakakorikori kia rite ki ngā hiahia o te kiritaki.

Ko ngā whakamahinga noa o te koiri kume kowiri tira ko ngā whakawhiti wera, ngā wāhanga whakamahana, ngā ngongo ngāwari, ngā taputapu tātari, ngā hua taputapu kai, ngā puna, me ngā taputapu pokanga.

Ngā māka

Kei te wātea tā mātou pepa/pereti kowiri tira i roto i ngā raupapa 300, 400 me te 200. He āhuatanga motuhake tō ia momo. Ko ngā momo rongonui ko te 304, he ngāwari te hurihuri, te hanga rānei, ā, nā tōna ātete pai ki te waikura me te ngāwari ki te whakarewa, ko tētahi o ngā momo rongonui e wātea ana. Ko te 316 he koranu kei roto ko te molybdenum e whakanui ana i te ātete ki te waikura, ā, he tino whai hua i roto i ngā taiao waikawa nā te mea he nui ake te ātete ki te waikura pitting. Ko te 321 he momo o te 304 me te tāpiri o te titanium, he ātete ki te waikura intergranular, ā, he tino pai te ngāwari ki te whakarewa. Ko te momo 430 he koranu kowiri tira ferritic e tuku ana i te ātete pai ki te waikura, ā, e whakamahia nuitia ana i roto i ngā ahumahi kāinga me te kai.