Abakhiqizi be-valve besango abaziwayo: amandla okwakhiwa komkhiqizo
Ngokusheshisa kwenqubo yezimboni, imboni yama-valve ekuthuthukisweni komnotho waseShayina iya ibaluleka kakhulu, phakathi kwayo, i-valve yesango njengegatsha elibalulekile lemboni yama-valve, ukusetshenziswa kwayo kumandla, i-petrochemical, amanzi...
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