Tuubbada Spiral (SSAW) waa tollayn kaarboon bir ah oo wareeg ah oo ka samaysan gariiradda birta fidsan sida walxo ceeriin ah, oo inta badan si diiran loo soo saaro, oo lagu alxanayo habka alxanka arc laba-geesoodka ah ee tooska ah. Waxaa inta badan loo isticmaalaa injineernimada sahayda biyaha, petrochemical, kiimikaalka, korontada, beeraha ...
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