Isingeniso: I-valve yesango lommese yaziwa nangokuthi i-valve yesango lommese, i-valve yesango lommese, i-slurry valve, i-valve yodaka, izingxenye zayo zokuvula nokuvala ziyisango, isiqondiso sokuhamba kwesango sibhekene nesiqondiso soketshezi, ngokusika. fibre material blade isango ukusika medium...
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