Radial nsalu nsalu kwa yamphamvu mankhwala ma CD kapangidwe mtundu wa ma CD zida makinawa amagwiritsidwa ntchito mu silinda imodzi kapena angapo yamphamvu mbale m'lifupi mwake chinthu pamwamba kuzimata phukusi, zopepuka ndi zolemera mankhwala ndi ntchito, ndi zotsatira za fumbi, chinyezi, kuyeretsa.