1. Kev ua haujlwm tau nyab xeeb thiab ntseeg tau, nres tau ruaj khov, thiab ua haujlwm tau ntau dua.
2. Ua kom muaj kev sib kis tau zoo, ua haujlwm ntev, tsis xav tau lubrication thaum siv.
3. Cov nres no tuaj yeem teeb tsa tau raws li cov neeg siv khoom xav tau.
4. Lub snap-in brake khau muaj kev nyab xeeb thiab ntseeg tau, thiab nws yooj yim thiab hloov pauv sai.
5. Tsis tas yuav hloov kho cov cuab yeej sib nrug sib nrug.
