Official Answer
Answer
Impeta ya spiral ikusanyirijwe mu nsinga zimaze kuba mu 'bushyuhe bwo mu mpeshyi' cyangwa 'zishushanyije cyane'. Ibi bivuze ko ibikoresho bimaze kugira imbaraga zingana cyane mbere yo gutondeka. Imashini ikonjesha igomba gukoresha imbaraga zihagije kugirango ihindure insinga mu ruziga, mu gihe ibarwa 'kugaruka', aho diameter yimpeta yiyongera gato nyuma yo kurekurwa muri mandel. Ubu buryo bukonje bukora byongera imbaraga zumusaruro kuri fibre yinyuma yimpeta, ariko niba insinga ikomeye cyane, irashobora gukura mikorobe kuri diameter y'imbere mugihe cyo gutwika, biganisha kunanirwa mugihe cyo kuyishyiraho.
