Ko ngā wāhanga matua/taputapu taurite o te taputapu keri (pūwero whakaeke) ko ngā tāke paru, ngā papu paru, te pou keri, ngā wāhi kume, te tēpu hurihuri, te puku o runga rānei, te aho keri, ngā taputapu whakaputa hiko, ngā taputapu haumaru me ngā taputapu āwhina.
Ko ngā wāhanga ōrite pai te pūtake o te rere maeneene me te whai hua o te taputapu. Ka hanga tonu a VS Petro me te tuku i ngā taputapu taputapu keri kounga teitei me te whānuitanga katoa i runga anō i te mahi a ō mātou tohunga ngaio i ngā wāhanga katoa o te keri me te tiaki i te puna hinu/hau.
Me te tino whakahaere i ia taahiraa hanga o te hoahoa, ngā rauemi, te huihuinga, te whakamātautau me te peita, ka tukuna e mātou ngā taputapu keri pai rawa atu e rite ana ki tēnā.
Ko ngā taputapu katoa o te mīhini keri e tutuki ana i ngā paerewa API, ISO, GOST rānei.
