★ Muaj zog thiab ruaj khov-Ua los ntawm cov khoom zoo hlau
★ Nrog zoo durability thiab robustness
★ Kev kho qhov chaw zoo dua hnav-tiv taus
★ hmoov txheej thiab tiv thaiv xeb
★ tuaj yeem siv sab hauv tsev thiab sab nraum zoov
★ Kho ntau lub kaum sab xis
★ Uas yog heev haum rau inclining