Mô tả
1 Leg section lows down to make head highter (Than Leg Section)
2. Back section lows down to make leg section h1ghter (Than head Section)
3. Step on the middle of the pedal, make the bed base fall down steadily
Four double side casters of 6 inch diam- eter, simultaneously lockable by the step pedal at both sides.
TPR tire no worn out after running 30KM, save anti-winding hard shell, united form- ing without bolts