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Isikhwama sephepha eliphrintiwe ngokwezifiso
Isikhwama esiyisicaba, esibizwa nangokuthi isikhwama sezinhlangothi ezintathu, ngoba sibeke uphawu ezinhlangothini ezintathu, futhi kushiya kuphela ukuvuleka okukodwa kwabasebenzisi ukufaka imikhiqizo. Isikhwama esiyisicaba siwuhlobo lwesikhwama esivame kakhulu futhi esilula. Ukuqina komoya kwesikhwama sokupakisha okuyisicaba kuhamba phambili, futhi ukuphela kohlobo olungasetshenziswa njengesikhwama se-vacuum.
