Dhuumaha birta waa shay muhiim ah oo si weyn loogu isticmaalo dhismaha, injineernimada, batroolka, warshadaha kiimikada, hawada hawada, iyo meelaha kale. Waxaa ka mid ah noocyada badan ee tuubooyinka birta, K235D birta birta ayaa soo jiidatay dareen badan oo ku saabsan waxqabadkeeda tayada sare leh iyo goobaha codsiga ballaaran. Marka hore,...
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