■ Qhov siab ntawm cov ceg taw tuaj yeem hloov kho kom yooj yim rau cov neeg siv nkag mus rau lub tshuab.
■ Cov ceg taw tuaj yeem hloov kho ob qho tib si rau pem hauv ntej thiab rov qab, haum rau cov neeg siv qhov siab sib txawv thiab ntev ntev.
■ Lub kaum sab xis ntawm lub pedal yog inclined thiab coated nrog cov xim tsis muaj plam.
■ Elastic band txuas cov ntsiab lus tso cai rau kev txhawb siab tshaj plaws ntawm cov leeg nqaij pawg yam tsis tau poob ntawm qhov nro ntawm qhov kawg ntawm qhov ntau ntawm cov lus tsa suab.
