Amabhola ensimbi angagqwali ahlangabezana nezidingo zebhola elingaphakathi nelona elinobutha obuhle nokumelana nokugqwala. Ukumelana nokugqwala kungandiswa ngokungenisa. Womabili amabhola angafakwanga ama-an-anveryed futhi anvelsed asetshenziswa kabanzi kuma-valves kanye nemishini ehlobene nayo.