Mun fahimci cewa yankan ruwa yana da mahimman kaddarorin kamar sanyaya, lubrication, rigakafin tsatsa, tsaftacewa, da sauransu. Waɗannan kaddarorin ana samun su ta hanyar ƙari daban-daban waɗanda ke da ayyuka daban-daban. Wasu additives suna samar da man shafawa, wasu suna hana tsatsa, wasu kuma suna da ƙwayoyin cuta da ...
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