Nā te kaha o te rauemi hiato o te maitai konupora me te maitai koranu, ka taea te whakatakoto i tētahi koranu ātete-pakaru me te pakeke kaha ki runga i te mata, kia tino whakapai ake ai te kaha o te mata o te niho peere, kia whiwhi ai i tētahi niho peere tino pai. Nā te mea he pakari ōna mātāpono i roto i te tukanga ātete tauraki, me whiriwhiri ngā koranu whakakikorua he pakeke teitei me te ātete-pakaru pai i roto i te rauemi.
E ai ki ngā rangahau e pā ana, he kaha ake te ātete o te rino teitei ki te kakahu i te maitai manganese teitei, ā, ka whakamahia te koranu rino teitei, te koranu rino maka martensitic rānei, hei hanga niho peere hou, hei whakatika hoki i ngā niho peere tawhito. I te wā e whakatikahia ana te maimoatanga, ka taea te tapahi i te mura acetylene mā te pito o te niho peere tawhito, ka waiho he awaawa, kātahi ka whakamahi i te tokotoko whakarewa manganese maitai austenitic hei hanga maimoatanga e rite ana ki te āhua taketake, ā, hei whakamutunga, ka pania te maimoatanga whakarewa ki te mata hei whakapai ake i te ātete kakahu o ngā keri nui i roto i ngā maina.

Tuatahi, te tikanga tapahi
Ina tauhohe te niho pākete ki te toka (kohatu) i raro i te kawenga pānga nui, i tetahi taha, ka pā ki te mata o te toka (kohatu) ka puta he kaha pānga nui. Ki te iti te kaha tuku o te rauemi niho pākete, ka puta he āhua kirihou i te pito o te niho pākete, ka ngāwari te hanga i tētahi awaawa kirihou. I tetahi atu taha, ina whakaurua te niho pākete ki roto i te toka (kohatu), ki te iti iho te pakeke o te niho pākete i te pakeke o te toka (kohatu), ka panaia ngā matūriki toka (kohatu) ki roto i te mata o te niho pākete, ka puta he maramara roa i te āhua o te piko, o te porowhita rānei, ka hanga he awa tapahi, ka haere tahi me ngā maramara tapahi moroiti. Nā te mahi kutikuti me te maha o ngā whakarerekētanga o te maramara, ka puta he nui o te wera huna o te whakarerekētanga, ka puta he tata me te whakarite pai o ngā kaupae paheke, ka puta he kita, hei tāpiri, ko tōna waku ki te toka (kohatu) ka puta he wera waku, ka puta he pānga whakakotahi o te wera huna o te whakarerekētanga me te wera waku ka piki ake te pāmahana o te maramara, ka huri te hangarua hihiri, ka whakangawari te whakamahana, ka huri te āhua hihiri, me ētahi atu, ka huri i te hanganga o roto o te maramara, ka puta hoki ētahi āhuatanga rewa ā-rohe.
Tuarua, te tikanga tihore ngenge
Ka whakaurua te niho pākete ki roto i te toka (kohatu) hei whakahoki, ā, ka kuruhia te awa parau kirihou i hangaia ki runga i te mata e ngā matūriki toka i runga i te hiki ake mō ngā wā maha, ka taea te hanga i tētahi tēpu rere-maha whakarewa, ā, ka puta he kapiti me ngā pakaru pakarukaru ina neke atu te ahotea o te rauemi niho pākete i te rohe kaha. Ko te tuatahi ka pakaru poutū ki te ahunga kakahu, ā, ko tetahi ka pakaru, ka haehae rānei i te ahunga kakahu, me ngā rārangi maeneene he awaawa ki te taha o mua, he papatahi ki te taha o muri, me ngā rārangi taupatupatu i hangaia e te pakaru whakarerekētanga i ngā taha. Mena he koki te toka, ka kutikuti i te paparanga whakarerekētanga ka hanga he paru, he papatahi, he maramara me ngā taha taratara. Tērā anō hoki tētahi āhuatanga, ina mahi tonu te niho pākete me te toka, ka rerekē te āhua o te niho pākete kirihou ka puta he pānga pakeke nui, kia pakarukaru ai te mata o te niho pākete, i raro i te pānga kaha o te toka, ka hanga he maramara pakarukaru te mata o te niho, ā, he kapiti radial o te hohonutanga rerekē tōna mata. Ko tēnei āhuatanga pakarukaru he tikanga pakarukaru hoki nō te ngenge. Ko te tikanga pakarukaru e pā ana ki te rauemi me ngā āhuatanga mahi, tae atu ki te tapahi, te tihore ngenge me ētahi atu tikanga. I te nuinga o te wā, ko te tikanga tapahi te mea nui rawa atu i te tukanga pakarukaru o ngā niho peere, neke atu i te 70; Mēnā ka piki ake te pakeke o ngā niho peere, ka piki haere te tikanga tihore ngenge, ko te 20~30; Ina tae te pakeke o te rauemi ki te rohe o runga, ka piki ake te pakarukaru, ā, ka puta pea he pakarukaru. Mō ngā āhuatanga mahi e nui ana te tikanga tapahi, ko te whakapai ake i te pakeke o te rauemi niho peere he mea pai hei whakapai ake i tōna ātete pakarukaru; Mō te tikanga tihore ngenge, me pai te noho o te rauemi kia mārō, kia pakari hoki;Te pakeketanga teitei, te pakari o te whati, te tere tipu iti o te kapiti me te ātete nui ki te ngenge pānga, ka whai wāhi katoa ēnei ki te whakapai ake i te ātete kakahu o ngā rauemi.