Official Answer
Answer
Guteka impeta ya spiral ikubiyemo gukora ubukonje bukomeye, butangiza impagarara nyinshi zisigaye kuri diameter yo hanze hamwe no guhagarika umutima kuri diameter y'imbere. Hatabayeho kugabanya imihangayiko (mubisanzwe kuri 350-400 ° C kubyuma bya karubone), izo mpagarara zisigaye zirashobora gutera 'kugaruka' cyangwa guhungabana kurwego mugihe. Icy'ingenzi cyane, ibisigisigi bya tensile bisigaye hejuru bigabanya cyane umunaniro wumunaniro kandi byongera ibyago byo guturika-ruswa. Guhangayikishwa no 'guhagarika' impeta, kwemeza ko guhagarika kwishyiriraho na diameter bigumaho kwihanganira mugihe cyubuzima bwa serivisi.
