Pereti mata

Ka whakaputa i ngā momo pereti parahi paerewa katoa, ngongo parahi, pae parahi, rīpene parahi, ngongo parahi, pereti me te koiri konumohe, me ngā whakaritenga kore-paerewa. Ka whakaratohia e te kamupene te 10 miriona tana o ngā rauemi parahi i te tau katoa. Ko ngā paerewa matua o te hua ko: GB/T, GJB, ASTM, JIS me ngā rauemi parahi paerewa Tiamana: DINH59, HPB58-3, HPB59-1, H62, H65, H68, H70, H85, H90 parahi tiaki taiao kore-mata, parahi manganese, parahi silicon, parahi konumohe, parahi parakore T2, TU1, TU2, parahi whakakore waikura phosphorus TP2, H62, C36000, parahi konumohe 9-4 parahi tine 5-5-6-6-3 10-1 10-2 Konutea parahi mā nikara parahi mā silicon Parahi Qsi3-1 Qsi1-3 parahi kōrome parahi kōrome zirconium C18200 C18000 C18150 CuNi2Si parahi kōrome tine QSn6.5-0.1QSn7-0.2C5191.