6, koporo alloy valve: a loketse bakeng sa PN≤ 2.5mpa metsi, metsi a leoatle, oksijene, moea, oli le mecha ea litaba tse ling, hammoho le mocheso oa -40 ~ 250 ℃ mouoane medium, hangata sebelisoa bakeng sa ZGnSn10Zn2 (tin boronse), H62 , HPB59-1 (koporo), QAZ19-2, QA19-4(aluminium bronze).7, mocheso o phahameng koporo: loketseng bakeng sa nom...
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