Marka aad dooratid tuubada ERW-wareejinta, arrimaha la tixgelinayo waxaa ka mid ah awoodda wax-soo-saarka, dhexroorka dhexroorka tuubada, waafaqid walxaha, heerka iswada, iyo taageerada iibka kadib. Ugu horrayn, awoodda wax-soo-saarku waa arrin muhiim ah oo go'aamisa inta tuubbo ee mishiinka duuban ay soo saari karaan gudaha ...
Sii akhri