Ko ngā porotini pōhiko māpara he taputapu whakamāmātia motuhake i hangaia kia whakapai ake i te rite o te māpara—ko tētahi karu pakaru, he waiarata hoki—i te wā e tiaki ana i tana papanga ngoikera mai i ngā whara. Ko te māpara, ko te nuinga ka hangaia ki te kāririhi, he uaua ki te whakaatu me te kōpū, nō reira kua whanake ngā porotini ki te whakamāmātia āwhina engari e āhua whai hua ana, me ngā takotoranga māmā kia pāmahana ai te pōhiko, te kotahi te tere kia kore ai e whara. Kei te wātea ngā porotini ki te whānui o ngā rahi para (100-200 grit) hei tango i ngā tohu noa mai i te tarau, ki te rahi waenganui (400-800 grit) hei whakapai ake i te papanga, ina wehe atu ki te rahi iti (1500-3000 grit) hei whiwhi i te pāpaku. Ko ngā tauira whakamāmātia ko ngā pāpaku diamanti kei roto i te pāpaku resin, e whakaratohia ai te kaha tapapa engari kāore i te ririhau. Mō ngā rahi iti ake, ko ngā diamanti he iti ake me te kīato ake, kia pōhiko ai i te māpara kaua ko te paraihe. Ko te takotoranga tuarā he pōroiti makku, he pōroiti pirau rānei e āwhina ana i te papanga māpara, e wehenga ana i te pēhi kotahi te tere kia kore ai te wearawa. Ka whakamahia ētahi porotini pōhiko māpara i te wai hei āwheta, e maroke ai te porotini, e iti ai te miramira, ā, e āwhina ai i te wai o te māpara, kia kore ai te poka. Ko te tikanga pōhiko māwai hoki i te māpara, e āwhina ana i ngā kaimahi kia kite i te tae mutunga me te tauira, he mea matua nui tēnā hei whakatōtika i ngā papa tōtika, ngā papa whenua, ngā whakapapa rānei. Anō hoki i te whakapai ake i te pāpaku, āwhina ana ēnei porotini i te māpara kia kore ai e whara i ngā wai, pērā i te vīna, te hinu rānei. Ka whakamahia hoki ēnei e ngā tohunga whakarewa anō i te māpara kia tango i ngā tohu kōpū, i ngā whara rānei i runga i ngā papanga māpara kei te wā, whakahokia ana i te rite tuatahi. Mā te tōtō i te tino kaha tapapa me te āwhina, ka tiakina e ngā porotini pōhiko māpara te rite ake o te kōhatu, kia noho tonu ai hei kōwhiringa mo ngā mahi umanga tiketike, me ngā whakapapa hāpai.
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Kei te whai take ake a Dongtai ki te tu tonu i te rāwhiti me te whakamahere mō te whakatipu o te horopaki matapou-taonga ā-ao.
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