Umahluko phakathi kweSango kunye neGlobe Valve
Ivalve yesango kunye neglobhu yeglowubhu zombini ziivalve ezininzi ezijikayo, kwaye zezona ntlobo zevalvu zisetyenziswa kakhulu kwi-oyile negesi, kwipetrochemical, kunyango lwamanzi, kwimigodi, kwiziko lombane, njl. njl. Uyazi ukuba yintoni umahluko phakathi kwazo?...
Jonga Ngakumbi