He tokomaha ka kite he iti te utu mō ngā taputapu hanga karāhe whakamātao, he māmā noa iho ngā mahi whakahaere i roto i te rangahau me te whanaketanga, he iti te utu, he teitei te tere whakamahinga, ā, he tino pai hoki te pānga ka taea e ia. Ka taea e tātou te whakamahi i ngā momo hangarau matua rerekē me te whakatutuki i ngā hua pai i roto i te tukanga R&D, kia nui ai te āwhina a te katoa i roto i te tukanga whiriwhiri.

I muri i te tukunga o ngā mōhiohio mō te karāhe, pērā i te karāhe papatahi noa, i te karāhe whakamaroke rānei, ka taea te whakatau i te kaha pakaru o te pepa karāhe taketake i runga i te ariā hoahoa kaha karāhe. Nā te mea ko te karāhe i hangaia e te mīhini karāhe whakamahana he mea tito mai i ngā wahi karāhe e rua (neke atu rānei i te rua) o te karāhe, ā, ko te hiri huri noa i te oumu ka hanga he paparanga hau hiri. Ina pāngia tetahi taha o te karāhe whakamahana e te kawenga, ka rerekē te āhua o te taha taumaha o te karāhe ka whakawhāiti i te hau i roto i te paparanga whakamahana, ā, ka piki ake te pēhanga hau, ka tukuna ētahi kawenga ki tērā taha o te karāhe. Nō reira, i roto i te āhua hiri hau, ko te karāhe whakamahana he paparanga e rua. E rua ngā karāhe karāhe ka waha ngātahi i te kawenga, ā, e rua ngā karāhe ka rerekē ngātahi. Ko te karāhe whakamahana he karāhe papatahi e rua-paparanga, he paparanga maha-paparanga rānei, he mea hanga ki te anga konumohe kua whakakiia ki te whakamaroke me te herea ki te ngaru butyl basic me te kāpia polysulfide.

Hei whakapai ake i te taiao whakaputa o te karāhe ārai, me whakaputa te karāhe ārai i roto i te taiao kāore he puehu, he parahanga whakarewa, ā, he pāmahana e tika ana. Ka nui te pānga kino o te parahanga puehu i roto i te awheawhe whakaputa ki te hononga o ia wāhanga o te pūnaha hiri karāhe ārai.

I mua i te tapahi i te karāhe o ngā puranga rerekē mai i ngā kaihanga rerekē, me tirotiro tuatahi mēnā he rerekētanga tae, ā, me wehewehe i te karāhe he nui ake te rerekētanga tae mō ngā kaupapa rerekē, mō ngā mata whare rerekē rānei. Me whakatinana te tauine tapahi karāhe kia rite ki ngā whakaritenga o te tuhi. Me aro te kaiwhakahaere ki te āhua o te karāhe, ā, kaua e kitea he hapa kitea pērā i te karawarawa me te mirumiru. Te whiriwhiri i te pae konumohe me te koki: me 0 te matotoru o te pae konumohe. 30ｍｍ＞０. Me ōrite te matotoru i waenga i te 35mm me te 35mm, ā, me tohatoha ōrite ngā pūaha hau. Me whakakoi, me whakakore rānei i te paru o te rīpene konumohe. Me whiriwhiri ngā hua kounga pai me te taumata teitei hei whakapai ake i te tere whakamahinga o te rīpene konumohe. Me whiriwhiri te rahi o te koki whakauru, ā, me horoi te āhua.