Feteleza ma CD thumba, anayi mbali kusindikiza aluminized ma CD thumba, chitetezo chabwino cha mankhwala, si zosavuta agglomerate, popanda kutaya mphamvu ya feteleza, anayi mbali kusindikiza ma CD thumba, kupatula kusindikiza pa malekezero onse, mbali utenga njira wa kusindikiza kutentha kwa mbali zinayi, zomwe zimakulitsa mkati mwa thumba lachikwama.