Sida nooc ka mid ah qalabka sifaynta biyaha, tuubooyinka u janjeera waxaa inta badan loo isticmaalaa daaweynta wasakhda, sida wasakhda warshad kiimikada, bulaacada gudaha, bulaacada warshadda dawooyinka, bulaacada warshad warqad, iwm, waxaa lagu dabaqi karaa in lagu daweeyo bulaacada warshadaha kala duwan, iyo Waxa kale oo loo isticmaali karaa nadiifinta biyaha iyo soo dejinta ciidda ka saarista biyaha marka lagu daro daaweynta wasakhda.