6, parahi koranu takirere: pai mo te PN≤ 2.5mpa wai, wai moana, hāora, rangi, hinu me ētahi atu pāpāho, me te pāmahana o -40 ~ 250 ℃ reo mamaoa, whakamahia nuitia mo ZGnSn10Zn2(tine parahi), H62 , HPB59-1 (parahi), QAZ19-2, QA19-4(parahi konumohe).7, parahi pāmahana teitei: e tika ana mo te nom...
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