pob tshab huab cua foob opp daim kab xevFeem ntau yog siv rau hauv cov thawv ntim khoom, cov khoom seem ruaj ruaj, cov khoom ntse khi thiab cov qauv tsim kos duab.Tshwj xeeb yog qhov kub thiab txias (-30 degree), nws tseem yuav nplaum.
Nta ntawmpob tshab huab cua foob opp daim kab xev: Flexibility, Smoothness, Anti-transfer, Anti-fragmentation, Anti-stripping,