He kowiri tira whakakikorua-tae

Te whakaputa i nga momo pereti parahi paerewa katoa, te ngongo parahi, te paera parahi, te tarai parahi, te ngongo parahi, te pereti konumohe me te porowhita, me te whakaritenga kore-paerewa.Ka whakaratohia e te kamupene 10 miriona taranata o nga taonga parahi i te tau katoa.Ko nga paerewa hua matua ko: GB / T, GJB, ASTM, JIS me nga taonga parahi paerewa Tiamana: DINH59, HPB58-3, HPB59-1, H62, H65, H68, H70, H85, H90 kore-kore te parahi tiaki taiao, konupora parahi, parahi silicon, parahi konumohe, parahi parakore T2, TU1, TU2, ūkuikui deoxidized parahi TP2, H62, C36000, konumohe parahi 9-4 tine parahi 5-5-6-6-3 10-1 10-2 Zinc parahi ma. nickel ma parahi silicon parahi Qsi3-1 Qsi1-3 Chrome parahi Chrome zirconium parahi C18200 C18000 C18150 CuNi2Si Tin-phosphor Bronze QSn6.5-0.1QSn7-0.2C5191.