Zovala zapabowo zachitsulo zotayira zimagawidwa m'mabowo achitsulo ndi zovundikira zachitsulo zotuwa, kunena zambiri, zovundikira zazitsulo zachitsulo zokulirapo kuposa kukana kukanikiza kwachitsulo chachitsulo chotuwa.Zomwe zimagwiritsidwa ntchito povundikira dzenje lachitsulo chotuwa nthawi zambiri ndi HT200, ndipo zomwe zimagwiritsidwa ntchito povundikira m'mabowo a inki ya ductile nthawi zambiri zimakhala QT500-7.

Makhalidwe a chivundikiro cha spheroidal inki manhole:

Kulimba mtima kwabwino.Mtengo wake ndi wofanana ndi wachitsulo chapakati cha kaboni komanso nthawi zopitilira 10 kuposa chitsulo chotuwa.

Kukana kwamphamvu kwa dzimbiri.Kuyesa kwa dzimbiri kutsitsi, masiku 90 a dzimbiri ndi chitoliro chachitsulo cha 1/40, ndi chitoliro chachitsulo cha 1/10.Moyo wautumiki ndi 2 nthawi ya chitoliro chachitsulo chotuwa ndi kasanu kuposa chitoliro chachitsulo wamba.

Mapulasitiki abwino.Elongation≥7%, yofanana ndi zida zachitsulo zapamwamba za kaboni, pomwe chitsulo chotuwa ndi ziro.

Mphamvu zapamwamba.Mphamvu yamphamvu ob≥420MPa, perekani mphamvu os≥300MPa, ndi chitsulo chochepa cha carbon ndi chofanana, ndi katatu chachitsulo chotuwa.

Kugwiritsa ntchito: msewu wamatauni, msewu waukulu, kulumikizana, mphamvu, madzi apampopi, anthu ammudzi, sukulu ndi mapaki ena.