(1) Kev nruj nruj, muaj zog buffering thiab kev co muaj peev xwm nqus, thiab siab deformation zog ib chav tsev ntim ntawm cov khoom.
(2) Nyuaj-kho tus yam ntxwv. Cov tawv nqaij tuaj yeem kho tau los ntawm kev hloov pauv sib txawv ua ke ntawm crest qhov siab, dav, thiab tuab. Kev nruj kuj tuaj yeem hloov kho los ntawm tus lej ntawm cov phaj sib xyaw.
(3) Muab piv rau disc springs, nws muaj qhov zoo xws li lub zog siab, kev ua haujlwm zoo, thiab muaj zog cuam tshuam.
(4) Compact qauv qhov ntev; nyob rau hauv tib lub theoretical tsis, nws yuav tsum tau tsawg installation qhov chaw.
