Rassev – Elash – sifter – Elash yordamida zarralarni o’lchamiga qarab tasniflash.
Rossqpg’ – Sochma – ‘lacer – Tug’ma konni nurashdan va suv oqimi yordamida o’z o’rnini o’zgartirg
Ruda – Ruda – ore – Tarkibida metall yoki metall birikmalari bo’lgan tog’ jinsi.
Rudnotermicheskaya pechg’ – Rudnotermik pech – ore-smelting furnace –
Samorodok – Tug’ma metall – native metal – Tabiatda sof ҳolda uchraydigan metallar(asosan oltin).
Sgushenie – Quyultirish – thickening – Markazdan qochma kuch yoki og’irlik kuchi tahsirida qattiq moddani cho’ktirib,suyuq moddani ajratib olish jarayoni.
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